// the full index
All tools
250+ utilities across 10+ desks. Press ⌘K anywhere to jump straight to one.
Finance— Money math, worked out in full.
Paycheck Calculator (US)Estimate take-home pay after federal, FICA, and state tax — for any US state.Salary Calculator (UK · CA · AU)Take-home pay after tax for the UK, Canada, and Australia.Income Tax Calculator (India)Compare your FY 2025-26 tax under the new and old regimes side by side.GST Calculator (India)Add or remove GST at 5/12/18/28%, with the CGST and SGST split.CTC to In-Hand Salary (India)Estimate monthly take-home from your CTC after EPF, tax, and professional tax.HRA Exemption Calculator (India)Work out your tax-exempt House Rent Allowance with the least-of-three rule.Loan & EMI Calculator (US)Monthly payment, total interest, and a full amortization schedule.Compound Interest (US)Watch a balance grow with regular contributions and compounding.Debt Payoff Calculator (US)Plan your path to debt-free with the snowball or avalanche method.Mortgage Calculator (US)Estimate your full monthly mortgage payment including PITI, PMI, and HOA.Retirement Calculator (US)Project your retirement nest egg with compounding contributions and inflation.Loan Eligibility Calculator (US)Find the maximum loan you can qualify for based on income and FOIR/DTI.Dividend Calculator (US)Project dividend income and portfolio growth with optional DRIP reinvestment.Tip CalculatorCalculate tips and split the bill easily among friends.Discount CalculatorCalculate sale prices, savings, and final prices with tax.VAT CalculatorAdd or remove value-added tax (VAT) from a price.Inflation CalculatorCalculate how inflation affects purchasing power over time.CAGR CalculatorCalculate the Compound Annual Growth Rate of investments.ROI CalculatorCalculate the return on investment (ROI) and annualized ROI.Break-Even CalculatorFind the sales volume and units required to break even.Savings Goal CalculatorFind out how much you need to save monthly to reach your goal.Hourly to Annual Salary ConverterConvert hourly pay to annual salary, or vice versa, instantly.Credit Card Payoff CalculatorFind the time and interest required to pay off credit card debt.Auto Loan CalculatorCalculate monthly auto loan payments, interest, and total cost.Rent vs Buy CalculatorCompare the net cost of renting a home against buying one.Stock Average Down CalculatorCalculate the new average share price after subsequent purchases.Crypto Profit CalculatorCalculate cryptocurrency investment profits, fees, and ROI.SIP Calculator (India)Estimate future value and wealth gain from mutual fund SIP investments.FD Calculator (India)Calculate Fixed Deposit interest earnings and maturity amount.RD Calculator (India)Estimate maturity amounts and interest for Recurring Deposits.PPF Calculator (India)Project Public Provident Fund growth, interest, and maturity values.Stock Position Size CalculatorCalculate the optimal shares to purchase based on account size and risk tolerance.Stop-Loss / Take-Profit CalculatorDefine trade target prices and protection limits by percentage margins.Dividend Yield CalculatorCalculate dividend yields by comparing annual dividend payout against share prices.Stock Split CalculatorCalculate adjusted share counts and prices before/after stock splits.Graham Intrinsic Value CalculatorDetermine Benjamin Graham intrinsic values for value investing.Brokerage & Tax CalculatorEstimate total broker charges, GST, STT, and transaction tax costs.SIP vs Lumpsum CalculatorCompare wealth growth projections for monthly SIPs vs single lump sum investments.Stock Overview & RatiosCheck P/E ratios, EPS, yield, and mock AI stock reports for symbols.Stock Screener-LiteScreen common market stocks by yield targets and maximum P/E caps.Position Average Cost CalculatorCalculate weighted average costs for stock holdings across multiple purchase batches.IBAN Validator & Swift Code CheckerValidate International Bank Account Numbers (IBAN) and check structure codes.Invoice GeneratorCreate and print customized invoices with tax calculation and item tables.Net Worth Calculatorassets minus liabilities401(k) / EPF Growth Calculatorlong-term retirement contributionsSalary Raise / Hike Calculatorpercentage raise impactOptions & derivativesBlack-Scholes, call/put option, options spread, implied volatilityBondsbond price, bond yield, yield to maturity, current yieldEquity metricsCAPM, beta, P/E ratio, EPS, book value, WACCBusiness / microeconomicsEBITDA, depreciation (straight-line & accumulated), inventory turnover, working capital, markup vs margin, commissionTaxtax bracket, FICA, self-employment tax, capital gains, sales taxRetirement expansion401(k), Roth IRA, traditional IRA, annuity, social securityNet Worth, Emergency Fund & Wedding Budget Calculators *(net worth already listed in Part 2)*Net Worth, Emergency Fund & Wedding Budget Calculators *(net worth already listed in Part 2)* online toolStudent Loan & Debt Avalanche/Snowball Calculators *(Luminus has `debt-payoff`verify it covers both strategies)*Mortgage Refinance & Amortization Schedule (with printable table)Mortgage Refinance & Amortization Schedule (with printable table) online toolSalary long-tail pagesannual income, salary-to-hourlyEngagement Rate & Gender Pay Gap Calculators *(marketing/HR fit)*Engagement Rate & Gender Pay Gap Calculators *(marketing/HR fit)* online toolX-Frame-Options / Clickjacking TestX-Frame-Options / Clickjacking Test online tool
Health— Body metrics from proven formulas.
TDEE CalculatorDaily calories you burn, plus targets for cut, maintain, or bulk.BMI CalculatorBody Mass Index with the WHO category and your healthy weight range.BMR CalculatorEstimate your basal metabolic rate with Mifflin-St Jeor and Harris-Benedict.Macro CalculatorSplit daily calories into protein, carb and fat grams by diet preset.Calorie CalculatorFind maintenance calories and targets to lose, maintain or gain weight.Body Fat CalculatorEstimate body fat percentage with the US Navy tape method.Ideal Weight CalculatorIdeal body weight by Devine, Robinson, Miller and Hamwi formulas.One-Rep Max CalculatorEstimate your 1RM and build a percentage-of-max lifting table.Water Intake CalculatorDaily water target from body weight and activity, in liters and ounces.Protein Intake CalculatorRecommended daily protein range by goal, plus per-meal targets.Running Pace CalculatorPace, speed and race-time predictions from distance and time.Due Date CalculatorEstimate pregnancy due date, current progress and conception from LMP.Ovulation CalculatorPredict ovulation, fertile window and upcoming period dates.Sleep Cycle CalculatorCalculate optimal bedtime or wake-up times based on sleep cycles.Heart Rate Zones CalculatorDetermine target training zones using age and resting heart rate.Calories Burned CalculatorEstimate calories burned during activities using MET values.Lean Body Mass CalculatorCalculate lean body mass, fat mass, and body fat percentage.Waist-to-Hip Ratio CalculatorAssess body fat distribution and cardiovascular health risk.A1C to Glucose ConverterConvert HbA1c to average blood glucose levels (eAG) and vice versa.Blood Pressure CategoryEvaluate systolic and diastolic blood pressure values.Child Height PredictorPredict child adult height using parental height measurements.BAC CalculatorEstimate blood alcohol concentration (BAC) over time.Pregnancy Weight Gain CalculatorDetermine recommended weight gain targets by pregnancy week.Keto Macro CalculatorCalculate macronutrient targets (carbs, protein, fat) for ketogenic diet.Wilks & DOTS Score CalculatorCalculate relative strength performance scores for powerlifting.Smoking Cost CalculatorCalculate the total financial cost of smoking over time.Fasting TimerInteractive timer for intermittent fasting tracking.Molar Mass / Molecular Weight Calculator *(highest-volume chemistry term)*Molar Mass / Molecular Weight Calculator *(highest-volume chemistry term)* online toolMetal & pipe weightsteel/aluminum/metal/pipe/plate weightPercentile calculatorsbaby weight/height/head circumference, BMI percentile, height percentilePediatric toolsbaby formula & milk intake, adjusted age, child dosageDosage calculatorsTylenol/paracetamol, ibuprofen, Benadryl, general mg/kg dose, drug half-lifeClinical scoresGFR/creatinine clearance, anion gap, corrected calcium, MAP, QTc, Wells score, GCS, CHA₂DS₂-VAScCholesterol & metabolicLDL, cholesterol ratio, cholesterol unit converter, metabolic syndromePregnancy expansionconception date, gestational age, hCG levels, implantation, period calculator, IVF due dateArmy/fitness standardsACFT, APFT, Navy body fat, Air Force PTSleep & screeningsleep debt, Epworth sleepiness, PHQ-2 depression, GAD-7 anxietyBlood Type Inheritance Calculator, Blood Donation Due DateBlood Type Inheritance Calculator, Blood Donation Due Date online toolWeight Loss Percentage / Calorie Deficit / Goal Weight Date CalculatorWeight Loss Percentage / Calorie Deficit / Goal Weight Date Calculator online toolVitamin & Micronutrient Intake Calculators, Weight Watchers PointsVitamin & Micronutrient Intake Calculators, Weight Watchers Points online toolCalories-burned long-tailwalking, swimming, jump rope, stairs, hiking, ellipticalDog & Cat Age Calculators, Dog/Cat Pregnancy Calculators *(22 + 12 + 10 toolsconsumer traffic, trivial to build)*
SEO & Marketing— Generators for the search-visible layer.
Meta Tag GeneratorTitle, description, and Open Graph tags with a live Google preview.Slug GeneratorTurn any headline into a clean, URL-safe slug.PageSpeed & Core Web Vitals TestCheck any page's Google performance score and Core Web Vitals, lab and field.Domain Authority CheckerCheck any domain's Open PageRank score (0–10) and global rank — free, no credit card.Schema Markup GeneratorBuild valid JSON-LD for articles, FAQs, products, and businesses.SERP Snippet PreviewSee how your title and description render in Google, with pixel widths.Open Graph PreviewPreview your share card on Facebook, X, and LinkedIn before you post.Robots.txt GeneratorCompose crawl rules per bot, with presets and a sitemap line.XML Sitemap GeneratorTurn a list of URLs into a valid sitemap.xml you can download.Hreflang Tag GeneratorGenerate alternate-language link tags, with x-default handled.Keyword Density CheckerCount the top words and phrases in pasted text, with percentages.Keyword SuggestionsGet real Google autocomplete suggestions for any seed keyword — free, no key needed.UTM Link BuilderAdd campaign tracking parameters to any URL, cleanly encoded.Redirect GeneratorWrite 301/302 rules for Apache .htaccess or Nginx from a redirect map.Disavow File GeneratorClean a list of toxic links into a Google-ready disavow.txt.Privacy Policy GeneratorGenerate standard, customized Privacy Policies for websites.Terms & Conditions GeneratorCreate customized Terms and Conditions for websites and apps.Disclaimer GeneratorGenerate customized standard website disclaimers.Email Signature GeneratorDesign professional, clean HTML email signatures.A/B Test Significance Calculator *(also a SEO/marketing toolfits Luminus's existing marketing category)*JSON Repairauto-fix malformed/broken JSONJSON Visual Editordrag-and-drop tree editor for JSON nodesJSON Schema Validatorvalidate a JSON document against a JSON SchemaJSON Schema Buildervisually construct a JSON Schema from scratchJSON to Schemaauto-generate a JSON Schema from a sample documentJSON Patchgenerate and apply RFC 6902 JSON Patch operationsJSON Merge Patchgenerate and apply RFC 7396 Merge Patch documentsCompare Clipsside-by-side text/JSON comparison toolJSON Searchfull-text search inside a large JSON documentJSON Sortsort keys alphabetically or by valueJSON Key Renamerbulk-rename all occurrences of a keyJSON Remove Keysstrip specified keys from a documentJSON Transformapply a JMESPath / jq-style transform expressionJSON Flattencollapse nested JSON to a flat key-value map (dot-notation)JSON Splitsplit a JSON array into multiple files/chunksJSON Escape / Unescapeescape special characters for embedding in stringsJSON to Stringserialize JSON to a JavaScript/Python string literalJSON Parseparse a JSON string literal back to formatted JSONJSON EncryptAES-encrypt a JSON payload client-sideJSON Size Analyzershow byte size and key-count breakdown of a JSON docJSON Pointerevaluate RFC 6901 JSON Pointer expressionsJSON NDJSON Converterconvert between JSON arrays and NDJSON (newline-delimited JSON)JSON Sample Generatorgenerate realistic sample JSON from a schema or templateJSON → Excel (XLSX)export JSON to a downloadable spreadsheetJSON → SQLgenerate INSERT statements from a JSON arrayJSON → Avroconvert JSON to Apache Avro schema + dataJSON → Protobufgenerate a `.proto` schema from JSONJSON → XSD / XSD → JSONconvert between JSON and XML Schema DefinitionJSON → Java POJOgenerate Java classes (with getters/setters) from JSONJSON → C#generate C# model classes from JSONJSON → Python (dataclass / TypedDict)generate Python type stubs from JSONLoad JSON from URLfetch a remote JSON endpoint and view/edit it in the browserJPG → AVIFaggressive modern compression for web deliveryPNG → AVIFtransparency-ready AVIF outputAVIF → JPGcompatibility fallback from AVIFAVIF → PNGlossless working copy from AVIF filesHEIC → PNGlossless output from iPhone HEICAdd Backgroundpad a transparent/cropped image to a solid-color canvasBlur / Pixelateselective region blur for faces, plates, sensitive dataImage Diffpixel-by-pixel comparison of two images with difference heatmapSignature Resizerresize a signature image to exact pixel dimensions for form/portal uploadsSocial Media Resizerpreset dimensions for Instagram, YouTube, Twitter, LinkedIn, Open GraphResize for Instagramdedicated square (1080×1080) and portrait (1080×1350) presetsReadability CheckerFlesch-Kincaid, Gunning Fog, and SMOG score for a block of textKeyword Density Checkercount how many times a keyword appears and its percentage in pasted textText Compare & Duplicate Phrase Checkerside-by-side text diff with duplicate phrase highlightingWord Counterlive word, character, sentence, and paragraph counts with reading-time estimateKeyword Research Toolpull related keyword ideas and search-volume estimates for a seed keywordKeywords Density Checker *(duplicate entry consolidated above)*Keywords Density Checker *(duplicate entry consolidated above)* online toolBacklink Audit Toolfetch known backlinks to a URL and flag toxic/low-quality linksWebsite Broken Link Checkercrawl a page and report all 4xx/5xx internal linksWebsite Link Analyzer Toolextract and classify all links (internal, external, nofollow) from a URLWebsite SEO Score Checkeraggregate on-page SEO audit (title, meta, H1, image alt, canonical, speed)Online Ping Website Toolsend a ping/HTTP check to a URL and show response timePage Speed Testmeasure TTFB, FCP, and total load time via a live URL fetchWebsite Page Size Checkerreport total page weight (HTML + assets) for a URLXML Sitemap Generatorbuild a `sitemap.xml` from a list of URLs with priority and changefreqAdSense Calculatorestimate monthly AdSense revenue from RPM, impressions, and CTR inputsAdSense Checkerverify whether a page has AdSense code installed and which ad units are presentMobile Friendly Testcheck whether a URL passes Google's mobile-friendly criteriaRobots.txt Generatorbuild a `robots.txt` file with allow/disallow rules for common botsRobots.txt Testertest whether a given URL is allowed or blocked by a pasted `robots.txt`Website Checkerfull-page audit (title, meta, h-tags, images, links, speed) for any URLUTM Buildergenerate UTM-tagged URLs for campaign trackingURL Slug Generatorconvert a title or phrase to a clean URL slugGEO Checker (AI Search Visibility)verify whether a URL appears in AI-generated answer results (Google AI Overviews, Perplexity, ChatGPT search)Spider Simulatorrender a page as a search-engine crawler sees it (no JS, just HTML)Check Server Statuslive HTTP status check for a domain with response-code displayIs It Downcheck whether a URL is accessible globally or just for the userDomain Age Checkerlook up when a domain was first registeredDomain Strength Checkerestimate a domain's authority/trust scoreIndexability Checkerverify how many pages of a domain are indexed in GoogleMeta Tags Analyzerfetch a URL and display all meta tags (title, description, OG, Twitter, robots)Meta Tag GeneratorGUI to build optimised `<title>` and `<meta description>` tags with character-count guardrailsSchema Markup Generatorvisually build JSON-LD for Article, Product, FAQ, BreadcrumbList, and LocalBusiness schema typesSERP Snippet Previewlive Google SERP preview of a title + description + URLHreflang Generatorbuild `<link rel=\"alternate\" hreflang=\"…\">` tags for multilingual pagesOpen Graph Checkerfetch a URL and inspect its OG/Twitter Card tags with a social-preview renderOpen Graph GeneratorGUI to generate complete OG and Twitter Card meta-tag blocksTwitter / X Card Generatorgenerate `<meta name=\"twitter:…\">` tag blocks with card-type previewSocial Media Previewcombined OG + Twitter Card preview showing how a URL looks when shared on major platforms
Developer— The encode / decode / inspect baseline.
JSON FormatterPretty-print, minify, and validate JSON with the error line called out.Base64 Encode / DecodeConvert text to Base64 and back, Unicode-safe.JWT DecoderRead the header and payload of a JSON Web Token, with expiry checked.Hash GeneratorSHA-1, SHA-256, and SHA-512 digests, computed in your browser.URL Encoder / DecoderPercent-encode or decode text and whole URLs, component by component.Regex TesterTest a pattern against sample text with live match highlighting and groups.Cron Expression ParserRead a crontab line in plain English and see its next run times.Unix Timestamp ConverterConvert between Unix time and human dates, in your zone and UTC.Color ConverterTranslate a color between HEX, RGB, and HSL with a live swatch.JSON ↔ CSV ConverterTurn a JSON array into CSV, or a CSV table back into JSON.Text DiffCompare two blocks of text and see exactly what changed, line by line.HTML/CSS/JS MinifierMinify HTML, CSS, or JavaScript code to save file size.SQL FormatterFormat and beautify SQL queries with proper indentation.YAML ↔ JSON ConverterConvert configuration files between JSON and YAML formats.HTML Entity EncoderEncode or decode HTML entities to prevent rendering issues.String EscaperEscape or unescape string special characters and slashes.Chmod CalculatorCalculate octal and symbolic notations for Linux file permissions.User-Agent ParserParse and analyze browser, OS, and device info from a User-Agent string.CSS Gradient GeneratorDesign beautiful CSS linear and radial gradients visually.CSS Box Shadow GeneratorDesign outer and inset CSS box shadows visually with preview.CSS Border Radius GeneratorDesign rounded borders visually for CSS custom boxes.SVG to Data URIConvert raw SVG code into a CSS-ready percent-encoded Data URI.WCAG Contrast CheckerAnalyze color contrast ratios against WCAG 2.0 AA/AAA accessibility standards.URL ParserExtract host, path, port, protocol, and query parameters from any URL.DNS LookupQuery A, AAAA, MX, NS, TXT, and CNAME records using Cloudflare DoH.Subnet CalculatorCalculate subnets, hosts, ranges, broadcast, and CIDR prefix masks.Cron Expression GeneratorGenerate cron schedules visually and translate to crontab lines.CSS Clip-Path GeneratorGenerate visual CSS polygon clip paths for shapes and layouts.CSS Blob GeneratorGenerate smooth organic liquid CSS blob shapes.SVG Wave GeneratorGenerate smooth SVG wave divider shapes for sections.Git Cheat SheetSearchable git commands quick reference guide.Regex Cheat SheetSearchable regex syntax reference guide.HTTP Status CodesSearchable reference of all official HTTP status codes.MIME Types ReferenceSearchable list of file extensions and MIME content types.Keyboard Shortcuts GuideGeneral operating systems and development editor shortcuts guide.Screen RecorderRecord your screen and system/microphone audio directly in-browser.Voice RecorderRecord audio from your microphone natively in-browser.Bcrypt Generator & CheckerGenerate secure Bcrypt hashes or verify passwords against hash codes.HMAC GeneratorCalculate secure keyed-hash message authentication codes (HMAC).AES Encrypt / DecryptEncrypt and decrypt text payload with secure AES-GCM password keys.RSA Key Pair GeneratorGenerate secure 2048-bit RSA Public/Private keys in PEM format.TOTP Authenticator GeneratorGenerate 2FA validation codes from base32 seed keys.Secure Token GeneratorGenerate cryptographically secure tokens, hex codes, or UUIDs.Password Strength AnalyzerTest password entropy, length, complexity, and get strength advice.BIP39 Mnemonic GeneratorGenerate secure BIP39 compliant 12 or 24-word passphrases.GEO IP LocatorFind geolocation metadata for any IP address.Server Status CheckerCheck server response headers and status codes in-browser.Redirect CheckerTrace redirect loops and URL paths dynamically.Page Size CheckerCalculate webpage source code weight in kilobytes.Spider SimulatorSimulate a crawler bot extracting plaintext page weights.Open Graph Meta ParserExtract Facebook OG and Twitter meta card tags from any page.Mobile Viewport SimulatorSimulate custom mobile viewport rendering for layout testing.What Is My IP (Dual-Stack)Detect your public IPv4 and IPv6 addresses side-by-side in real-time.WebRTC Leak CheckerDetect private local IP addresses leaking through WebRTC connections.DNS / VPN Leak ChecklistLearn how to test and verify if your DNS queries leak outside your VPN.Browser Fingerprint DiagnosticCheck Canvas, WebGL, AudioContext, and system font footprint uniqueness.Internet Speed TestTest your download connection transfer speed client-side.Edge Server Ping LatencyCheck round-trip ping latency to AWS, Cloudflare, and Google servers.HTTP Client Header AuditInspect HTTP request headers and client environment variables.DNSBL Blacklist AuditVerify if your IP address is blacklisted on major anti-spam databases.Email Header AnalyzerTrace SMTP hops and check SPF/DKIM flags from raw email headers.MX & SPF ValidatorInspect a domain's DNS MX mail servers and SPF safety validation records.Resolution & Viewport MonitorTrack screen resolution, viewport bounds, and pixel ratios in real-time.Screen Aspect Ratio CalculatorSimplify resolution dimensions into mathematical aspect ratios (e.g. 16:9).Monitor PPI Density CalculatorCalculate display pixel density (PPI) based on size and resolution.Regex Data ExtractorExtract emails, URLs, IPs, and card numbers from raw unstructured text.XOR Cipher ToolEncrypt and decrypt text payload using simple bitwise XOR calculations.XML Formatter & LinterValidate and format raw XML markup structures with indentation.TOML FormatterFormat and indent TOML configuration syntax parameters.Argument EscaperEscape command line arguments for Bash, Windows CMD, and PowerShell.Base32 Encoder / DecoderEncode text to and decode from Base32 (RFC 4648) format.Basic Auth Header GeneratorGenerate HTTP Basic Authentication headers from username and password.CSV Viewer & Table GridBrowse, filter, and inspect CSV files inside an interactive spreadsheet table grid.Device & Browser DiagnosticsView diagnostic information about your browser, OS, screen resolution, and hardware.Docker Run to Compose ConverterConvert docker run commands into clean docker-compose YAML configuration files.Hex Encoder / DecoderEncode strings to hexadecimal representation and decode hex back to text.Hex File ViewerUpload any file to view its raw binary bytes in a classic hex dump layout.IPv4 Address ConverterConvert IPv4 addresses between dot-decimal, binary, octal, hexadecimal, and integer formats.IPv4 CIDR Range ExpanderExpand a CIDR block or IP range into a complete list of individual IP addresses.IPv4 Subnet CalculatorCalculate subnets, network details, usable IP range, and masks from CIDR notation.IPv6 Unique Local Address GeneratorGenerate RFC 4193 Unique Local IPv6 Address (ULA) prefixes.JSON Diff & CompareCompare two JSON objects side-by-side and highlight additions, edits, and deletions.JSONPath Expression EvaluatorQuery and extract elements from JSON data using standard JSONPath queries.Keyboard Keycode LookupPress any key to view its Javascript KeyboardEvent key, code, and keycode values.MAC Address GeneratorGenerate random, formatted Media Access Control (MAC) addresses.Random Available Port GeneratorGenerate random, non-conflicting port numbers for dev, databases, or web servers.SQLite Database ViewerOpen, browse, and execute SQL queries on SQLite `.db` database files in-browser.Safelink & Redirect DecoderReveal target URLs from Outlook Safelinks, Proofpoint, and other tracking redirects.ULID Generator & DecoderGenerate Crockford Base32 lexicographically sortable unique IDs and decode timestamps.WebSocket Connection TesterConnect, listen, and send test messages to WebSocket endpoints securely.JSON to XML ConverterConvert JSON documents to structured XML markup tags.Keyboard Key Event TesterDiagnose individual keyboard keys on an interactive visual keyboard layout.JWT Generatorsign/create tokensJSON → TypeScript Interfacegenerate types from JSONJSON → Go Structgenerate structs from JSONcURL → Codeconvert a cURL command to fetch/axios/Python.htpasswd GeneratorApache password file entriesUUID v7 Generatortime-ordered UUIDsMarkdown Table Generatorbuild tables visuallyDiff / Patch Viewerunified diff and patch previewHash Identifierguess hash type from a digestWHOIS Lookupdomain registration detailsSSL / Certificate Checkerinspect a site's TLS certQR Code Scannerdecode an uploaded QR imageDice Rollerconfigurable diceCoin Fliprandom coin tossZIP Creator *(TinyWow, 11zon)*ZIP Creator *(TinyWow, 11zon)* online toolZIP / RAR / 7z Extractor *(11zon, FreeConvert.in)*ZIP / RAR / 7z Extractor *(11zon, FreeConvert.in)* online toolTOML ↔ JSON / YAML Converter *(Luminus formats TOML but can't convert it)*TOML ↔ JSON / YAML Converter *(Luminus formats TOML but can't convert it)* online toolMAC Address Lookupvendor/OUI databaseEmail Normalizercanonicalize gmail dots/aliasesBenchmark Buildercompare benchmark run means/varianceETA Calculatorcompletion time from rate and quantityHTML WYSIWYG Editorrich text → HTMLUPI QR Code Generatorpayment QR with UPI ID and amountStandard Deviation / Variance Calculator (population & sample)Standard Deviation / Variance Calculator (population & sample) online toolDice Probability / Coin Flip Probability / Lottery Odds *(pairs with the Dice Roller + Coin Flip already in Part 2)*Dice Probability / Coin Flip Probability / Lottery Odds *(pairs with the Dice Roller + Coin Flip already in Part 2)* online toolCarbon Footprint Calculator (general + flight, meat, plastic, crypto, AI water footprint)Carbon Footprint Calculator (general + flight, meat, plastic, crypto, AI water footprint) online toolLat/Long Distance Calculator + Antipode & Azimuth CalculatorsLat/Long Distance Calculator + Antipode & Azimuth Calculators online toolElectronics/tech dev toolspassword entropy, Hamming code & distance, parity bit, logic gate, floating-point (IEEE-754) inspector, RAID capacity, RAM latency, duty cycle, ASCII/Network calculatorsbandwidth, download time, upload time, data transfer, streaming bitrate, uptime (SLA nines), baud rate, bandwidth-delay productLogisticsCBM, dimensional weight, freight class, pallet, container loading, reorder point, takt time, DPMOEarth & weatherwind chill, earthquake magnitude, rainfall, rain-to-snow, sunrise/sunset, sunbathing/UVSeasons & holidaysChristmas countdown, Easter date, Diwali/festival countdown, Mayan calendarVigenère Cipher *(closes the one gap flagged in Part 2)*Vigenère Cipher *(closes the one gap flagged in Part 2)* online toolHash Identifier, Caesar Cipher Shifter *(both already listed in Part 2)*Hash Identifier, Caesar Cipher Shifter *(both already listed in Part 2)* online toolPERT Calculator, Age on Other Planets, Day-of-Week CalculatorPERT Calculator, Age on Other Planets, Day-of-Week Calculator online toolPopup Blocker TestPopup Blocker Test online toolCORS TestCORS Test online toolCSP (Content Security Policy) TestCSP (Content Security Policy) Test online toolService Worker Support TestService Worker Support Test online toolEval / JavaScript Execution TestEval / JavaScript Execution Test online toolDark Mode Detection Test *(`prefers-color-scheme`)*Dark Mode Detection Test *(`prefers-color-scheme`)* online toolAd/Tracker Blocking Rules TestAd/Tracker Blocking Rules Test online toolLink Revealerexpand shortened & redirect chainsComprehensive Privacy Testaggregate score across all of the aboveVision / Color Blindness Self-Test *(distinct from the existing `color-blindness` simulatorthis tests the , not the image)*Canvas Fingerprint DetectorCanvas Fingerprint Detector online toolClientRects Fingerprint DetectorClientRects Fingerprint Detector online toolFont Fingerprint Detector *(enumerate installed fonts)*Font Fingerprint Detector *(enumerate installed fonts)* online toolWebGL Fingerprint / GPU ReportWebGL Fingerprint / GPU Report online toolWebGPU Fingerprint / Capability ReportWebGPU Fingerprint / Capability Report online toolFile Encryptor / DecryptorAES on arbitrary files, client-sideFile Checksum / Hash VerifierMD5/SHA-1/SHA-256 of a dropped file, with expected-hash comparisonBinary Split & Mergesplit a large file into parts and rejoinP2P File TransferWebRTC direct browser-to-browser sendMetadata Editorread file metadataJavaScript Inspectorinspect/beautify a page's loaded scriptsePub ReaderePub Reader online toolMOBI ReaderMOBI Reader online toolLaTeX Editor + live preview *(fits alongside `markdown-editor`)*LaTeX Editor + live preview *(fits alongside `markdown-editor`)* online tool2048, Snake, Dinosaur Runnerclassic mini-gamesMagic Squares / Sudoku Solver & GeneratorMagic Squares / Sudoku Solver & Generator online toolReaction Time Test ("Hit the Dot") *(also an Omni tool)*Reaction Time Test (\"Hit the Dot\") *(also an Omni tool)* online toolTyping Speed Test (WPM) *(also an Omni tooldual-listed in Part 5)*Font Viewerpreview and inspect a local font fileSQLite Managerfull CRUD, not just viewingCode Beautifierthe inverse of `html-css-js-minifier`WHOIS Lookup *(already listed in Part 2confirmed by a second source)*QR Code Reader *(already in Part 2)*QR Code Reader *(already in Part 2)* online tool
Text— Count, clean, and reshape writing.
Word CounterWords, characters, sentences, and reading time as you type.Case ConverterConvert text between UPPERCASE, camelCase, snake_case, kebab-case and more.Lorem Ipsum GeneratorGenerate placeholder text by paragraphs, sentences, or words.Find and ReplaceFind and replace text with regex, case options, dedupe and sort lines.Markdown to HTMLConvert Markdown to HTML with a live preview and source output.Bold Text GeneratorGenerate bold, cursive, script, gothic and double-struck unicode styles.Small Caps GeneratorConvert normal text to ꜱᴍᴀʟʟ ᴄᴀᴘꜱ unicode text instantly.Small Text GeneratorCreate superscript (ᵗⁱⁿʸ) and subscript (ₜᵢₙᵧ) text for bios and social posts.Upside Down Text GeneratorFlip your text upside down (ɟןıd) and reverse it.Reverse Text GeneratorReverse letters, words, or lines of text instantly.Invisible Character GeneratorCopy zero-width spaces or blank characters for blank names or empty bios.Morse Code TranslatorTranslate plain English text to Morse code and vice versa.Remove Line BreaksRemove line breaks and clean up extra whitespace in your text.ROT13 & Caesar CipherEncrypt or decrypt text using Caesar or ROT13 cipher shifts.Sentence CounterCount sentences, paragraphs, words, and characters in your text.Title CapitalizerCapitalize headlines according to Chicago, AP, or standard styling.Binary to Text ConverterConvert normal text to binary code and binary back to text.Sort and Deduplicate LinesSort lines of text alphabetically and remove duplicate lines.Word Frequency CounterCount occurrences and density percentages of each word in a text.Speech to TextConvert spoken voice into written text in real-time in your browser.Text to SpeechConvert written text into spoken audio waves with customized speed and voices.SRT ↔ WebVTT ConverterConvert subtitle file formats between SRT and WebVTT structures.Subtitle Timing ShifterShift all timestamps in an SRT subtitle file forward or backward.SRT Subtitle EditorLoad, edit, and save subtitle timings and text interactively.ASCII Art GeneratorConvert text to creative ASCII art banners and text drawings.Duplicate Line RemoverRemove or isolate duplicate lines from text documents instantly.Emoji Picker & SearchSearch, browse, and copy emojis from all standard categories.NATO Phonetic Alphabet TranslatorTranslate words and phrases into NATO phonetic spelling (Alpha, Bravo, Charlie...).Number to Words ConverterConvert Arabic digit numbers into fully written English words.Numeronym GeneratorGenerate abbreviation numeronyms like i18n, a11y, or k8s from long words.Phone Number FormatterFormat raw phone numbers into standardized international or national telephone styles.String Information & StatsAnalyze char counts, word counts, byte lengths in UTF-8/UTF-16, and line breaks.String Obfuscator & EncoderObfuscate email addresses or text strings to hide them from email harvesters and scrapers.Text Line SorterSort lines in a text document alphabetically, reverse, by length, or randomly.Text Readability & StatisticsMeasure word counts, Flesch-Kincaid readability indexes, and sentence averages.Unicode Character Info LookupGet detailed information, category, codepoints, HTML entities, and encoding bytes for characters.Unicode Database SearchSearch the entire Unicode character database by name, codepoint, or range.HTML to Markdown ConverterConvert HTML source code markup clean and simple into Markdown text.Markdown EditorA live side-by-side Markdown writing editor with HTML preview, counts, and downloads.Palindrome Checkerdetect palindromesAnagram Solverfind anagrams of a word/phraseText Repeaterrepeat text N timesText generators Omni ranks for that Luminus lacksstrikethrough, subscript, superscript, mirror text, glitch text, cursive font, italic, underline, gothic font, WingdingsRight-Click & Text-Selection Blocking TestRight-Click & Text-Selection Blocking Test online toolRich Text / Word (DOCX) Editor *(overlaps the "HTML WYSIWYG Editor" item in Part 3)*Rich Text / Word (DOCX) Editor *(overlaps the \"HTML WYSIWYG Editor\" item in Part 3)* online toolPlain Text Editor with local autosavePlain Text Editor with local autosave online toolWord Search Puzzle Generator + Crossword GeneratorWord Search Puzzle Generator + Crossword Generator online tool
Generators— Make a thing from a short input.
Password GeneratorStrong, random passwords with a live strength read-out.UUID GeneratorBatch v4 UUIDs from the browser's crypto source.QR Code GeneratorMake a downloadable QR code from a link or any text.Random Number & Name GeneratorGenerate random numbers, names, or usernames with unique and sorted options.Favicon GeneratorCreate a text-based favicon and export PNGs at 32, 180, and 512 pixels..gitignore GeneratorBuild a .gitignore by combining common language, OS, and editor stacks.License GeneratorGenerate an open-source LICENSE file: MIT, Apache-2.0, BSD, ISC, GPLv3, Unlicense.Barcode GeneratorGenerate scannable barcodes in CODE128, EAN, UPC and more, then download SVG or PNG.BPM MetronomeKeep time with a visual and audio tempo metronome supporting various beat rates.WiFi QR Code GeneratorCreate downloadable QR codes to share your WiFi network name and password instantly.Video ConverterMP4/MOV/AVI/MKV/WebMVideo Compressor *(FreeConvert, Clideo, Convert.town)*Video Compressor *(FreeConvert, Clideo, Convert.town)* online toolVideo Trimmer / Cutter *(FreeConvert, TinyWow, Clideo, Convert.town)*Video Trimmer / Cutter *(FreeConvert, TinyWow, Clideo, Convert.town)* online toolExtract Audio from Video (MP4 → MP3) *(TinyWow, FreeConvert.in, Clideo, Convert.town)*Extract Audio from Video (MP4 → MP3) *(TinyWow, FreeConvert.in, Clideo, Convert.town)* online toolAudio ConverterMP3/WAV/FLAC/AAC/OGGAudio Compressor *(FreeConvert)*Audio Compressor *(FreeConvert)* online toolBurn Subtitles into Video *(TinyWow, Clideo; Luminus edits SRT but can't embed)*Burn Subtitles into Video *(TinyWow, Clideo; Luminus edits SRT but can't embed)* online toolSocial Video DownloaderTikTok/Instagram/Twitter/FacebookMusic suiteBPM tap, note frequency, chord finder & transposer, music scale, key signature, guitar fret & string tension, semitone, delay/reverb time, vocal rangeVideo gamesKD ratio, Minecraft circle generator & nether portal, D&D encounter/HP/point-buy, poker odds & EVAudio Output Test / Speaker Channel TestAudio Output Test / Speaker Channel Test online toolAudioContext Fingerprint DetectorAudioContext Fingerprint Detector online toolAudiobook Player (M4B chapters)Audiobook Player (M4B chapters) online toolVirtual Piano *(also pairs with the Omni music cluster in Part 5)*Virtual Piano *(also pairs with the Omni music cluster in Part 5)* online tool
Converters— Switch between units with exact factors.
Time Unit ConverterSeconds, minutes, hours, days, weeks, months, and years.Length ConverterMetres, feet, inches, miles, and more — converted instantly.Weight ConverterKilograms, pounds, ounces, stones, and tonnes.Temperature ConverterCelsius, Fahrenheit, and Kelvin with the formula shown.Area ConverterSquare metres, feet, acres, hectares, and miles.Volume ConverterLitres, gallons, cups, pints, and cubic metres.Speed Converterkm/h, mph, m/s, knots, and feet per second.Pressure ConverterPascals, bar, psi, atmospheres, and mmHg.Energy ConverterJoules, calories, kWh, BTU, and more.Data Size ConverterBytes, KB, MB, GB, and their binary KiB/MiB/GiB siblings.Cooking ConverterCups, tablespoons, teaspoons, millilitres, and fluid ounces.Fuel Economy ConverterMPG (US & UK), L/100km, and km/L, handled reciprocally.Shoe Size ConverterConvert shoe sizes between US, UK, EU, and CM for men, women, and kids.Clothing Size ConverterConvert clothing sizes across US, UK, EU, IT and alpha (XS–XXL) for women and men.Currency ConverterConvert between 28 world currencies with live, daily-updated exchange rates.Unified Unit ConverterConvert between various measurement units across multiple scientific categories.Archive ConverterRAR→ZIP etc.Ebook ConverterEPUB / MOBI / AZW3 ↔ PDFFont ConverterTTF / OTF / WOFF / WOFF2
Math— Calculators that just do the arithmetic.
Percentage CalculatorPercent of a number, what-percent, and percentage change — all three.Fraction CalculatorAdd, subtract, multiply, and divide fractions, simplified automatically.Statistics CalculatorMean, median, mode, range, variance, and standard deviation from a list.Ratio CalculatorSimplify a ratio or solve a proportion for the missing value.Scientific CalculatorTrig, logs, powers, and roots with a clean expression display.Significant FiguresCount significant figures and round a number to any precision.Number Base ConverterConvert between binary, octal, decimal, and hexadecimal at once.GPA CalculatorTurn course grades and credit hours into a weighted 4.0 GPA.Grade CalculatorWeight your assignments to find your current grade and what you still need.Math Expression EvaluatorEvaluate algebraic math expressions, formulas, and equations securely in-browser.Prime Number CheckerVerify if a number is prime and generate lists of prime numbers within ranges.Roman Numerals ConverterConvert normal integer numbers to Roman numerals and vice versa.Geometry suite (2D)area, perimeter, circle (circumference/arc/sector), polygon, trapezoid, ellipse, starTriangle suiteright triangle, hypotenuse, Pythagorean theorem, law of sines/cosines, area of triangle, 30-60-90, similar triangles3D geometry suitevolume & surface area for sphere/cylinder/cone/pyramid/prism/torusTrigonometrysin/cos/tan, inverse trig, unit circle, trig identity solverAlgebra solversquadratic equation, system of equations, factoring, polynomial roots, completing the square, synthetic division, slope & slope-intercept, distance forLinear algebra / matrix calculatordeterminant, inverse, multiply, transpose, rank, eigenvaluesExponents & logarithmslog, antilog, exponent, scientific notation, nth rootFraction ops expansionadd/subtract/multiply/divide, simplify, mixed number ↔ improper, decimal ↔ fractionArithmetic long-tailLCM, GCF/HCF, factorial, long division, rounding, weighted average, average, absolute changeSequencesFibonacci, arithmetic sequence, geometric sequence, series sumBinary arithmeticbinary add/subtract/multiply/divide, two's complement, bitwise opsPercent long-tailpercent error, percent change, percent difference, percent-off, fraction-to-percentMean, Median, Mode & Range CalculatorMean, Median, Mode & Range Calculator online toolFive Number Summary / IQR / Quartile / Outlier DetectorFive Number Summary / IQR / Quartile / Outlier Detector online toolZ-Score Calculator + Z-TableZ-Score Calculator + Z-Table online toolP-value Calculator *(one of Omni's top-16 featured tools)*P-value Calculator *(one of Omni's top-16 featured tools)* online toolConfidence Interval Calculator *(also top-16 featured)*Confidence Interval Calculator *(also top-16 featured)* online toolMargin of Error / Sample Size CalculatorMargin of Error / Sample Size Calculator online toolt-test, Chi-Square, ANOVA, F-statistic Calculatorst-test, Chi-Square, ANOVA, F-statistic Calculators online toolNormal / Binomial / Poisson Distribution CalculatorsNormal / Binomial / Poisson Distribution Calculators online toolLinear Regression & Correlation Coefficient (Pearson/Spearman) CalculatorLinear Regression & Correlation Coefficient (Pearson/Spearman) Calculator online toolR-squared / Coefficient of Determination CalculatorR-squared / Coefficient of Determination Calculator online toolProbability Calculator (single, joint, conditional, Bayes' theorem)Probability Calculator (single, joint, conditional, Bayes' theorem) online toolPermutation & Combination CalculatorPermutation & Combination Calculator online toolHistogram / Box Plot / Pie Chart Maker *(overlaps "Chart Maker" in Part 3)*Histogram / Box Plot / Pie Chart Maker *(overlaps \"Chart Maker\" in Part 3)* online toolElectronics suiteOhm's Law, resistor color code, LED resistor, voltage divider, series/parallel resistors & capacitors, wire gauge/size, RC & RLC circuit, 555 timer, rElectromagnetism / powerwatts to amps, kVA, voltage drop, power factor, electrical power, watt-hour, battery capacity & lifeKinematics & dynamicsspeed/velocity/acceleration, free fall, projectile motion, force, momentum, friction, stopping distanceEnergy, work & powerkinetic/potential energy, work, efficiency, power-to-weight ratioThermodynamics & heatideal gas law, Boyle's/Charles's law, specific heat, heat transfer, thermal expansion, BTU ↔ tons, water heatingFluid mechanicsBernoulli, Reynolds number, flow rate, pipe velocity/volume, hydrostatic & water pressure, dragAtmospheric physicsdew point, relative/absolute humidity, heat index, wind chill, air density, air pressure at altitudeOpticsSnell's law, lens/mirror equation, focal length, magnification, index of refractionAcousticsdecibel, dB gain, speed of sound, wavelength, frequency, Doppler effectAstronomy & relativityescape velocity, orbital period, light year, E=mc², time dilation, Schwarzschild radiusMaterials & mechanicsdensity, stress/strain, Young's modulus, beam deflection, gear ratio, pulley, spring rateMolarity, Molality & Normality CalculatorsMolarity, Molality & Normality Calculators online toolDilution / Solution Dilution / Serial Dilution CalculatorDilution / Solution Dilution / Serial Dilution Calculator online toolpH, pOH & Buffer pH (Henderson-Hasselbalch) CalculatorpH, pOH & Buffer pH (Henderson-Hasselbalch) Calculator online toolChemical Equation Balancer *(very high volume, purely algorithmic)*Chemical Equation Balancer *(very high volume, purely algorithmic)* online toolPercent Yield / Theoretical Yield / Actual Yield CalculatorPercent Yield / Theoretical Yield / Actual Yield Calculator online toolMole ↔ Grams ↔ Atoms Converters, Avogadro's Number CalculatorMole ↔ Grams ↔ Atoms Converters, Avogadro's Number Calculator online toolEmpirical & Molecular Formula CalculatorEmpirical & Molecular Formula Calculator online toolPercent Composition & Mass Percent CalculatorPercent Composition & Mass Percent Calculator online toolIdeal Gas Law / Combined Gas Law CalculatorIdeal Gas Law / Combined Gas Law Calculator online toolHalf-Life & Radioactive Decay CalculatorHalf-Life & Radioactive Decay Calculator online toolElectron Configuration & Atomic Mass CalculatorElectron Configuration & Atomic Mass Calculator online toolBoiling/Freezing Point Elevation & Depression, Vapor PressureBoiling/Freezing Point Elevation & Depression, Vapor Pressure online toolGibbs Free Energy, Entropy, Enthalpy CalculatorsGibbs Free Energy, Entropy, Enthalpy Calculators online toolBeer-Lambert Law CalculatorBeer-Lambert Law Calculator online toolInteractive Periodic Table *(not an Omni tool, but the obvious hub page for this whole cluster)*Interactive Periodic Table *(not an Omni tool, but the obvious hub page for this whole cluster)* online toolMaterials estimatorsconcrete, cement, mortar, grout, brick, block, gravel, sand, tile, drywall, lumber, plywood, rebar, decking, insulationArea / volume converterssquare footage, cubic yard, board foot, square feet ↔ cubic yardsHome & gardenpaint, wallpaper, carpet, flooring, paver, fence, deck stain, epoxy, stairs, ramp, ladder angleHVAC sizingAC tonnage, BTU, furnace/boiler size, CFM, air changes per hour, heat lossRoofingroof pitch, rafter length, shingles, roof truss, snow loadDrivewayasphalt, crushed stone, gravel driveway, road baseTanks & poolspool volume, tank volume, pipe volume, pond, GPMEngineering specsbeam load & deflection, bolt torque, floor joist, wood beam span, thread pitchGrams ↔ Cups / Tablespoons / Teaspoons Converters *(individual pages; huge volume)*Grams ↔ Cups / Tablespoons / Teaspoons Converters *(individual pages; huge volume)* online toolButter Stick Converter, Oil ↔ Butter, Yeast Converter, Self-rising FlourButter Stick Converter, Oil ↔ Butter, Yeast Converter, Self-rising Flour online toolCake Pan Size Converter & Cake Serving CalculatorCake Pan Size Converter & Cake Serving Calculator online toolBaker's Percentage & Sourdough CalculatorBaker's Percentage & Sourdough Calculator online toolPizza Size Comparison & Pizza Party CalculatorPizza Size Comparison & Pizza Party Calculator online toolCoffee-to-Water Ratio / Cold Brew Ratio CalculatorCoffee-to-Water Ratio / Cold Brew Ratio Calculator online toolRice-to-Water Ratio, Dry ↔ Cooked Pasta ConverterRice-to-Water Ratio, Dry ↔ Cooked Pasta Converter online toolTurkey / Ham / Steak Cooking Time & Thawing Calculators *(seasonal spikes)*Turkey / Ham / Steak Cooking Time & Thawing Calculators *(seasonal spikes)* online toolABV (Alcohol by Volume) & Standard Drink CalculatorABV (Alcohol by Volume) & Standard Drink Calculator online toolParty Drink / Wedding Alcohol / BBQ Party CalculatorParty Drink / Wedding Alcohol / BBQ Party Calculator online toolEgg Boiling Timer, Brine CalculatorEgg Boiling Timer, Brine Calculator online toolSolar Panel Size & Wattage Calculator *(strong commercial intent)*Solar Panel Size & Wattage Calculator *(strong commercial intent)* online toolEV / Plug-in Hybrid Running Cost Calculator *(pairs with `fuel-economy-converter`)*EV / Plug-in Hybrid Running Cost Calculator *(pairs with `fuel-economy-converter`)* online toolWind Turbine Output & Profit CalculatorWind Turbine Output & Profit Calculator online toolTree Benefits / Tap Water vs Bottled CalculatorTree Benefits / Tap Water vs Bottled Calculator online toolCricket suitebatting strike rate, bowling average, net run rate, Duckworth-LewisCycling suitebike size, bike gear/cadence, cycling wattage, e-bike range, calories burned bikingRunning expansionmarathon pace, race predictor, running splits, steps to km/miles, stride length, training paceBaseball / basketball statsbatting average, ERA, OPS, slugging %, true shooting %VO₂ Max & Max Heart Rate CalculatorsVO₂ Max & Max Heart Rate Calculators online toolBench Press 1RM / 5-3-1 / Bench Pyramid CalculatorsBench Press 1RM / 5-3-1 / Bench Pyramid Calculators online toolElo Rating & Winning Percentage CalculatorsElo Rating & Winning Percentage Calculators online toolPunnett Square Calculator (mono/di/trihybrid) *(highest-volume biology term)*Punnett Square Calculator (mono/di/trihybrid) *(highest-volume biology term)* online toolHardy-Weinberg Equilibrium CalculatorHardy-Weinberg Equilibrium Calculator online toolDNA → mRNA / Codon Translator, DNA Concentration CalculatorDNA → mRNA / Codon Translator, DNA Concentration Calculator online toolCell Doubling Time / Dilution CalculatorsCell Doubling Time / Dilution Calculators online toolGardeningplant spacing, soil volume, seed & fertilizer calculatorsCoordinates ConverterDD ↔ DMS ↔ UTM, lat/longPx ↔ Em ↔ Rem ↔ Pt Converter *(CSS toolfits the existing CSS cluster)*Crore ↔ Lakh ↔ Million ↔ Billion Converter *(India fitvery high volume)*Military / Zulu Time Converter *(Luminus has `timezone-converter` but not 24h ↔ 12h military notation)*Military / Zulu Time Converter *(Luminus has `timezone-converter` but not 24h ↔ 12h military notation)* online toolScale Calculator (model/map scale ratios)Scale Calculator (model/map scale ratios) online toolRing Size, Bra Size, Hat Size, Glove Size Converters *(Luminus has shoe & clothing size)*Ring Size, Bra Size, Hat Size, Glove Size Converters *(Luminus has shoe & clothing size)* online toolHardness Conversion (Rockwell/Brinell/Vickers), Mesh ↔ MicronHardness Conversion (Rockwell/Brinell/Vickers), Mesh ↔ Micron online toolGematria & Leet-speak Translators *(fun tier; sits next to `morse-translator` and `upside-down`)*Gematria & Leet-speak Translators *(fun tier; sits next to `morse-translator` and `upside-down`)* online toolTransportationfuel cost, gas trip cost, MPG, drive time, horsepower, compression ratio, tire size, wheel offset, 0-60Home economicselectricity cost, appliance wattage, generator wattage, LED savings, lumens to watts, cord of wood, unit priceSewing & fabricfabric, quilt, curtain size, tablecloth size, circle skirtDate & time long-tailmoon phase, leap year, day of the year, week number, Korean age, half birthday, anniversary, day-of-week for any date, add/subtract timeOffice & productivitymeeting cost, words per minute (typing test), reading time & reading speed, deadline, lead time, cycle timeRug/sofa/bed/TV/desk-size sizing calculators *(pairs with the existing `sizing-monitor`)*Rug/sofa/bed/TV/desk-size sizing calculators *(pairs with the existing `sizing-monitor`)* online toolGrade & test-score long-tailfinal grade, grade curve, semester grade, ACT/SAT/IELTS score
Dates & Time— Count days, ages, and durations.
Age CalculatorExact age in years, months, and days — plus your next birthday.Date DifferenceDays, weeks, and months between any two dates.Time DurationHow long between two times, in hours, minutes, and seconds.Business Days CalculatorCount working days between dates, skipping weekends and holidays.Countdown TimerA live countdown to any date — deadline, launch, or celebration.Timezone ConverterConvert a date and time from one timezone to multiple IANA timezones.Date-Time Format ConverterConvert dates and times to standard ISO, RFC, Local, and Unix Epoch formats.Time Card CalculatorCalculate daily/weekly work hours and estimated gross payroll.World Meeting PlannerCheck timezone overlaps and coordinate best meeting times across cities.Pomodoro Focus TimerImprove your productivity using customizable work and break interval timers.Stopwatchlap-timer companion to the countdown tool
PDF— Edit PDFs without uploading a thing.
Merge PDFCombine several PDFs into one file, in the order you choose.Split PDFPull out a page range into a new, smaller PDF.Rotate PDFTurn every page 90, 180, or 270 degrees and save.Images to PDFTurn JPG and PNG images into a single PDF document.PDF to JPG ConverterRender PDF pages into downloadable JPG images completely in-browser.PDF CompressorOptimize and compress PDF file sizes completely client-side.PDF Password Remover / Unlockstrip open passwordsPDF → Wordexport PDF to editable DOCXPDF Page Extractorpull selected pages into a new PDFPDF Watermarkstamp text/image onto pagesWord → PDF *(iLovePDF, Smallpdf, PDF24, TinyWow, 11zon, Convertio, Convert.town)*Word → PDF *(iLovePDF, Smallpdf, PDF24, TinyWow, 11zon, Convertio, Convert.town)* online toolExcel → PDF *(iLovePDF, Smallpdf, TinyWow, 11zon)*Excel → PDF *(iLovePDF, Smallpdf, TinyWow, 11zon)* online toolPowerPoint → PDF *(iLovePDF, Smallpdf, TinyWow, 11zon, Convert.town)*PowerPoint → PDF *(iLovePDF, Smallpdf, TinyWow, 11zon, Convert.town)* online toolPDF → Excel *(iLovePDF, Smallpdf, TinyWow, 11zon)*PDF → Excel *(iLovePDF, Smallpdf, TinyWow, 11zon)* online toolPDF → PowerPoint *(iLovePDF, Smallpdf, TinyWow, 11zon)*PDF → PowerPoint *(iLovePDF, Smallpdf, TinyWow, 11zon)* online toolPDF → Text *(TinyWow, 11zon, FreeConvert.in, Convert.town)*PDF → Text *(TinyWow, 11zon, FreeConvert.in, Convert.town)* online toolText (TXT) → PDF *(Smallpdf, 11zon)*Text (TXT) → PDF *(Smallpdf, 11zon)* online toolMarkdown → PDF *(Convert.town)*Markdown → PDF *(Convert.town)* online toolHTML / Webpage / URL → PDF *(iLovePDF, Smallpdf, PDF24, TinyWow, Convert.town)*HTML / Webpage / URL → PDF *(iLovePDF, Smallpdf, PDF24, TinyWow, Convert.town)* online toolPDF → PDF/A (archival format) *(iLovePDF)*PDF → PDF/A (archival format) *(iLovePDF)* online toolPDF → PNG / WebP / TIFFLuminus only exports JPGSVG → PDF *(Convert.town)*SVG → PDF *(Convert.town)* online toolPDF Editoradd text, shapes, highlightsPDF Annotatorcomments and markupOrganize / Reorder Pages *(iLovePDF, Smallpdf, PDF24, TinyWow, 11zon, FreeConvert.in)*Organize / Reorder Pages *(iLovePDF, Smallpdf, PDF24, TinyWow, 11zon, FreeConvert.in)* online toolDelete Pages *(iLovePDF, Smallpdf, PDF24, Convertio, FreeConvert.in)*Delete Pages *(iLovePDF, Smallpdf, PDF24, Convertio, FreeConvert.in)* online toolCrop PDF *(iLovePDF, Smallpdf, Convertio, FreeConvert.in)*Crop PDF *(iLovePDF, Smallpdf, Convertio, FreeConvert.in)* online toolAdd Page Numbers *(iLovePDF, Smallpdf, PDF24, 11zon, FreeConvert.in)*Add Page Numbers *(iLovePDF, Smallpdf, PDF24, 11zon, FreeConvert.in)* online toolExtract Images from PDF *(PDF24, Convertio, TinyWow, 11zon, Convert.town, ImageOnline)*Extract Images from PDF *(PDF24, Convertio, TinyWow, 11zon, Convert.town, ImageOnline)* online toolFlatten PDF *(Smallpdf, Convertio, FreeConvert)*Flatten PDF *(Smallpdf, Convertio, FreeConvert)* online toolOverlay PDFstamp one PDF over anotherRepair PDFrecover corrupted filesProtect PDFadd passwordSign PDF / e-Signature *(iLovePDF, Smallpdf, PDF24, TinyWow, FreeConvert.in, Convert.town)*Sign PDF / e-Signature *(iLovePDF, Smallpdf, PDF24, TinyWow, FreeConvert.in, Convert.town)* online toolRedact PDF *(iLovePDF, Smallpdf, PDF24, FreeConvert.in)*Redact PDF *(iLovePDF, Smallpdf, PDF24, FreeConvert.in)* online toolCompare PDFside-by-side diffPDF Form Filler *(iLovePDF, Smallpdf)*PDF Form Filler *(iLovePDF, Smallpdf)* online toolPDF OCRmake scans searchablePDF Reader / Viewer *(Smallpdf)*PDF Reader / Viewer *(Smallpdf)* online toolPDF Metadata Viewer / Editor *(FreeConvert.in)*PDF Metadata Viewer / Editor *(FreeConvert.in)* online toolPDF Signature Checkerverify digital signaturesChat with PDF *(Smallpdf "AI PDF" / ChatPDF)*Chat with PDF *(Smallpdf \"AI PDF\" / ChatPDF)* online toolPDF Summarizer *(iLovePDF, Smallpdf, TinyWow)*PDF Summarizer *(iLovePDF, Smallpdf, TinyWow)* online toolPDF Translator *(iLovePDF, Smallpdf, TinyWow)*PDF Translator *(iLovePDF, Smallpdf, TinyWow)* online toolQuestion / Quiz Generator from PDF *(Smallpdf)*Question / Quiz Generator from PDF *(Smallpdf)* online toolPDF → Audio (read aloud) *(Convert.town)*PDF → Audio (read aloud) *(Convert.town)* online toolJPG → PDF under 50/100/200/300/500KB *(Pi7)*JPG → PDF under 50/100/200/300/500KB *(Pi7)* online toolImage Upscaler, ZIP Reader/Writer, Video/Audio Converter, Image to Base64, Audio Joiner, Color Picker, PDF Reader, GIF Maker, Video Resizer *(all already listed in Parts 2–4WebBrowserTools independently confirms each)*
Image— Resize, convert, and compress in-browser.
Resize ImageScale an image to exact dimensions or a percentage.Compress ImageShrink a JPG or WebP's file size with a quality you control.Convert ImageSwitch an image between PNG, JPG, and WebP.Crop ImageCrop to an aspect ratio or your own selection.Image to Text (OCR)Extract text from images in your browser with multi-language OCR — no upload.Placeholder Image GeneratorGenerate custom SVG placeholder images with exact sizes and text.HEIC to JPG ConverterConvert iOS HEIC photos to JPG format in your browser.PNG to ICO ConverterConvert standard PNG files into Favicon .ico icons.SVG to PNG ConverterRender SVG vector markup graphics into standard PNG raster files.WebP to PNG ConverterConvert WebP images to standard PNG format.Background RemoverRemove light backgrounds from images using client-side chroma keying.Image to PromptAnalyze an image and generate descriptive prompt tag styles for AI generators.Camera & Webcam RecorderRecord video directly from your webcam with in-browser preview and download.Color Blindness SimulatorSimulate color vision deficiencies (Protanopia, Deuteranopia, Tritanopia) on any image.Color Palette GeneratorGenerate beautiful, cohesive color palettes from seed colors or schemes.ICO Icon GeneratorGenerate ICO icon files for website favicons from PNG or JPG images.Image Rotator & FlipperRotate or flip images clockwise, counter-clockwise, vertically, or horizontally.Image to ASCII Art ConverterConvert any image or photo into styled text-based ASCII art.Microphone Audio VisualizerVisualize your microphone audio signal with real-time waveform and frequency bar graphs.Image Watermark InjectorEmbed text or image watermarks overlayed onto your pictures securely in-browser.Color Picker / Eyedropperpick a color from an uploaded imageHEX ↔ Color Namenearest named CSS colorEXIF Viewer / Removerread and strip photo metadataImage → Base64 (Data URI)inline images for CSS/HTMLCircle / Rounded Cropcrop to circle for avatarsGIF Makerbuild a GIF from images/framesImage Upscaler (AI) *(iLoveIMG, TinyWow, ImageOnline, Pi7 "super resolution")*Image Upscaler (AI) *(iLoveIMG, TinyWow, ImageOnline, Pi7 \"super resolution\")* online toolUnblur / Sharpen Photo *(TinyWow, ImageOnline, Pi7)*Unblur / Sharpen Photo *(TinyWow, ImageOnline, Pi7)* online toolPhoto ColorizerB&W to colorRemove Objects / People / Text from Photo (AI cleanup) *(TinyWow, ImageOnline clone & heal, Pi7 blemish remover)*Remove Objects / People / Text from Photo (AI cleanup) *(TinyWow, ImageOnline clone & heal, Pi7 blemish remover)* online toolBlur Face / Blur Image *(iLoveIMG, TinyWow, FreeConvert.in, Convert.town, ImageOnline, Pi7)*Blur Face / Blur Image *(iLoveIMG, TinyWow, FreeConvert.in, Convert.town, ImageOnline, Pi7)* online toolPhoto Filters & Effectsgrayscale, pixelate, bordersImage Flippermirror horizontal/verticalCollage Maker / Merge Images *(TinyWow, 11zon, FreeConvert.in, ImageOnline, Pi7)*Collage Maker / Merge Images *(TinyWow, 11zon, FreeConvert.in, ImageOnline, Pi7)* online toolMeme Generator *(iLoveIMG, TinyWow, ImageOnline)*Meme Generator *(iLoveIMG, TinyWow, ImageOnline)* online toolPhoto Editorgeneral-purposeHTML / URL → Image (website screenshot) *(iLoveIMG, TinyWow, ImageOnline)*HTML / URL → Image (website screenshot) *(iLoveIMG, TinyWow, ImageOnline)* online toolSplit Imageinto grid tilesChart Makerquick chart imageResize Image to Target KB *(11zon, Pi7see Part 4 India section)*Profile Photo Maker *(TinyWow, ImageOnline "WhatsApp DP" / "Discord PFP")*Profile Photo Maker *(TinyWow, ImageOnline \"WhatsApp DP\" / \"Discord PFP\")* online toolCrop Video *(FreeConvert, Clideo)*Crop Video *(FreeConvert, Clideo)* online toolVideo → GIF and GIF → Video *(FreeConvert, TinyWow, Clideo, Convert.town, ImageOnline)*Video → GIF and GIF → Video *(FreeConvert, TinyWow, Clideo, Convert.town, ImageOnline)* online toolText → Unicode Escapes\u codes ↔ textMerge / Join Videos *(Clideo, ImageOnline)*Merge / Join Videos *(Clideo, ImageOnline)* online toolVideo Resizerpresets for Instagram/YouTube/TikTok aspect ratiosRotate / Flip Video *(Clideo)*Rotate / Flip Video *(Clideo)* online toolMute Video / Remove Audio *(Clideo, Convert.town, ImageOnline)*Mute Video / Remove Audio *(Clideo, Convert.town, ImageOnline)* online toolAdd Music to Video *(Clideo, ImageOnline)*Add Music to Video *(Clideo, ImageOnline)* online toolAdd Text / Logo / Watermark to Video *(Clideo)*Add Text / Logo / Watermark to Video *(Clideo)* online toolVideo Speed Changerslow-mo / timelapseLoop Video *(Clideo)*Loop Video *(Clideo)* online toolReverse Video *(Clideo, ImageOnline)*Reverse Video *(Clideo, ImageOnline)* online toolAdjust Videobrightness/contrast/saturationSlideshow Makerimages + music → videoExtract Video Framesstills from videoAuto Subtitle Generator (AI speech-to-SRT) *(Clideo; pairs with Luminus's existing `speech-to-text` and `srt-editor`)*Auto Subtitle Generator (AI speech-to-SRT) *(Clideo; pairs with Luminus's existing `speech-to-text` and `srt-editor`)* online toolAudio / Video Transcription & Translation *(Clideo; Luminus has mic-only speech-to-text)*Audio / Video Transcription & Translation *(Clideo; Luminus has mic-only speech-to-text)* online toolGIF Editorcrop, resize, rotate, flip, trimGIF Speed Changer & Loop Editor *(ImageOnline)*GIF Speed Changer & Loop Editor *(ImageOnline)* online toolReverse GIF *(ImageOnline)*Reverse GIF *(ImageOnline)* online toolGIF Frame Extractor / Frame Remover *(ImageOnline)*GIF Frame Extractor / Frame Remover *(ImageOnline)* online toolMerge GIFs *(ImageOnline)*Merge GIFs *(ImageOnline)* online toolAdd Text / Image to GIF *(ImageOnline, Clideo)*Add Text / Image to GIF *(ImageOnline, Clideo)* online toolGIF Compressor *(ImageOnline, FreeConvert)*GIF Compressor *(ImageOnline, FreeConvert)* online toolGIF ↔ Sprite Sheet *(ImageOnline)*GIF ↔ Sprite Sheet *(ImageOnline)* online toolPhoto Adjusterbrightness, contrast, saturation, hue, exposure, gamma, levels, curves, vibrance, temperaturePhoto Effects Studiosepia, vintage, duotone, pop-art, glitch, halftone, mosaic, emboss, posterize, solarize, ditheringArtistic Converterscartoon, oil painting, pencil sketch, line drawing, low-poly, pixel artPhoto Retouchred-eye removal, blemish remover, clone & heal brushAuto Enhance / Beautify *(ImageOnline, Pi7)*Auto Enhance / Beautify *(ImageOnline, Pi7)* online toolNoise Toolsadd film grain, denoise, JPEG artifact removalGreen Screen Remover *(ImageOnline)*Green Screen Remover *(ImageOnline)* online toolText Behind Image (AI depth effect) *(ImageOnline)*Text Behind Image (AI depth effect) *(ImageOnline)* online toolShape Cropheart, star, oval, hexagon, triangle, freehandImage Comparison Sliderbefore/afterImage Straightener / Perspective Correction *(ImageOnline)*Image Straightener / Perspective Correction *(ImageOnline)* online toolChange Image DPI + DPI Checker *(Convert.town, ImageOnline, Pi7)*Change Image DPI + DPI Checker *(Convert.town, ImageOnline, Pi7)* online toolDocument Scannerphoto → clean scanned docPSD / RAW / TIFF Viewer *(ImageOnline)*PSD / RAW / TIFF Viewer *(ImageOnline)* online toolSignature Makerdraw a signature, export transparent PNGSocial Media Image Resizerper-platform presetsInstagram Grid / Carousel Splitter *(ImageOnline, Pi7)*Instagram Grid / Carousel Splitter *(ImageOnline, Pi7)* online toolYouTube Thumbnail Maker (+ thumbnail downloader) *(ImageOnline)*YouTube Thumbnail Maker (+ thumbnail downloader) *(ImageOnline)* online toolOG Image Generatorsocial preview cardsQuote Image Maker *(ImageOnline)*Quote Image Maker *(ImageOnline)* online toolCertificate Generator *(ImageOnline)*Certificate Generator *(ImageOnline)* online toolCode → Imagepretty code screenshots (Carbon-style)Pixel Art Editor *(ImageOnline)*Pixel Art Editor *(ImageOnline)* online toolWhiteboard / Drawing Canvas *(no direct competitor equivalentsee canvas libraries below)*Printable Paper Generatorgraph, lined, dot-grid, isometric, music staffPattern Generatorscheckerboard, stripes, polka dots, solid colorImage Steganographyhide/reveal text in imagesImage Hash Generatorperceptual hashesHTML Image Map Generator *(ImageOnline)*HTML Image Map Generator *(ImageOnline)* online toolFavicon Downloadergrab any site's faviconOnline Ruler / Protractor / Image Measure *(ImageOnline)*Online Ruler / Protractor / Image Measure *(ImageOnline)* online toolPassport Photo Makercrop to 35×45mm etc., swap background to white/red/blueCompress Image to Exact KB10/20/50/100/200KB presetsIncrease Image Size in KBmeet minimum-size rulesResize in cm / mm / inchphysical dimensionsExam Photo PresetsUPSC, SSC, PAN card, PSC sizesMerge Photo + Signaturesingle upload sheetAudio Joinermerge tracksAudio Trimmer *(Convert.town, Clideo)*Audio Trimmer *(Convert.town, Clideo)* online toolPitch & Speed Changer *(Convert.town)*Pitch & Speed Changer *(Convert.town)* online toolBPM Detector *(Convert.town)*BPM Detector *(Convert.town)* online toolAudio → MIDI *(Convert.town)*Audio → MIDI *(Convert.town)* online toolCSV ↔ Excel (XLSX) *(Convert.town, TinyWow)*CSV ↔ Excel (XLSX) *(Convert.town, TinyWow)* online toolWord (DOCX) → Markdown *(Convert.town)*Word (DOCX) → Markdown *(Convert.town)* online toolBase58 Encoder/Decoder *(Convert.town; Luminus has Base32/64)*Base58 Encoder/Decoder *(Convert.town; Luminus has Base32/64)* online toolColumn ↔ Delimited List Convertercolumn ↔ comma/semicolon listPixels ↔ Inches / Print Size Converter *(DPI-aware; pairs with the Part 4 DPI tools)*Pixels ↔ Inches / Print Size Converter *(DPI-aware; pairs with the Part 4 DPI tools)* online toolPhoto & video suitedepth of field, hyperfocal distance, focal length, crop factor, exposure, shutter speed, camera FOV, image/video file size, timecode ↔ frames, TV sizeImage Downloader / Download-Attribute TestImage Downloader / Download-Attribute Test online toolImage Vectorizerraster → SVG (auto-trace)Video & Audio Muxercombine separate video and audio tracksRepair Videofix broken/truncated MP4 containersClassic Paint / MS-Paint clone *(overlaps "Whiteboard / Drawing Canvas" in Part 4)*Classic Paint / MS-Paint clone *(overlaps \"Whiteboard / Drawing Canvas\" in Part 4)* online toolSound Meter (decibel meter) *(extends `mic-visualizer`)*Sound Meter (decibel meter) *(extends `mic-visualizer`)* online toolLight Meterambient light via camera/sensorRadio Player / Podcast Player *(web-app tier rather than tool tierlower priority)*Web Conference / Meeting *(WebRTC; high build cost, evaluate carefully)*Web Conference / Meeting *(WebRTC; high build cost, evaluate carefully)* online toolOffline Chat with AIin-browser WebLLM
Weather— Live conditions and forecasts, no key needed.
AI Tools— Token math and Echo-powered writing help.
Token CounterCount tokens for GPT and Claude before you send a prompt.Prompt CleanerStrip smart quotes, stray whitespace, and hidden characters from a prompt.AI Content SignalsA transparent heuristic for how AI-written a passage reads — signals, not a verdict.AI Text HumanizerRewrite stiff, AI-sounding text so it reads like a person wrote it.Paraphrasing ToolReword any text in a tone you choose, keeping the meaning.SummarizerCondense long text into a short summary or a few bullet points.Prompt ImproverTurn a rough idea into a clear, well-structured AI prompt.AI Image GeneratorGenerate realistic or artistic images from a detailed text description.AI Grammar CheckerCheck and correct grammar, spelling, and phrasing errors in your text.AI Email WriterGenerate clean, professional, casual, or persuasive emails from a short brief.AI Resume BuilderBuild professional resumes with live previews and AI-powered achievements polishing.AI Business Name & Domain GeneratorGenerate catchy business name ideas and get instant domain availability variations.AI Startup Idea ValidatorCritically evaluate startup models, target audience alignment, and feasibility score.AI Brand Voice & Style Guide CreatorAnalyze your copy to generate a tone archetype and test live sentence conversions.AI High-Converting Ad Copy WriterWrite direct response copy variations for Facebook, Google, LinkedIn, and X.E-commerce Product Description WriterCreate search-optimized listings for Shopify, Amazon, and Etsy.AI Social Media Hook GeneratorGenerate high-performing, attention-grabbing scroll-stoppers for social channels.AI Blog Outline & Content PlannerGenerate H2/H3 semantic structure outlines and keyword maps for writing.AI FAQ Schema & Q&A GeneratorStructure frequently asked questions and compile valid JSON-LD FAQ Schema markup.AI Cover Letter GeneratorWrite a customized cover letter mapped to specific job description keywords.AI Interview Prep AssistantGet custom mock interview questions and expert answer guidelines for any role.AI Smart TranslatorTranslate texts across multiple languages while perfectly adapting tone and style.AI Code ExplainerUnderstand complex code snippets from any language with plain-English breakdowns.SQL Query GeneratorDescribe tables and target metrics to compile optimized relational SQL queries.Regex Explainer & CreatorBuild regular expression patterns from descriptions and explain how they execute.AI Image Alt-Text GeneratorAnalyze images to write descriptive, keyword-optimized accessibility alt-text.Keyword Intent ClustererCluster lists of keywords into informational, transactional, and commercial groups.SEO Title & Meta OptimizerGenerate click-optimized Meta Titles and Meta Descriptions for higher CTR.