JSON Formatter
Pretty-print, minify, and validate JSON with the error line called out.
Understand your result
Not sure what the numbers mean? Echo reads your result and explains it in plain words — then suggests a sensible next step.
Description
The JSON Formatter and Validator is a fast developer utility built to inspect, pretty-print, validate, and minify JSON data structures without network exposure. Paste your raw payload into the input box to instantly check for syntax errors such as missing quotation marks, trailing commas, unescaped characters, or unmatched braces. The editor formats nested objects and arrays with clear hierarchical indentation and provides a one-click copy button. Because all parsing is performed using JavaScript's native JSON parser in your browser, no API tokens, database records, or configuration files are ever sent across the web.
How to use
- Paste your raw JSON string or unformatted payload into the editor.
- Click Format to beautify with clean indentation or Minify to condense.
- Check the syntax status bar for instant error detection and line numbers.
- Copy the validated, formatted JSON back to your clipboard.
Why use this tool?
Pasting API keys, backend database payloads, or proprietary JSON into cloud-based formatters poses serious privacy and security risks. This tool validates and beautifies JSON entirely within your browser.
Features
- Instant JSON validation with pinpoint error highlight and line indicator.
- Configurable indentation (2 spaces, 4 spaces, or tabs).
- One-click JSON minification for reduced payload size.
- 100% client-side execution — sensitive tokens, keys, and schemas remain strictly private.