JSON Formatter & Validator Online

Format, validate, minify and beautify your JSON online for free. Auto-indent, syntax check, statistics. No sign-up, 100% in-browser.

Realtime Instant
JSON Input
Output 
Result...

How to use the JSON Formatter

Paste your JSON in the input field, then click Format & Validate. The tool will automatically indent the code and report any syntax errors with a precise message.

Available features

  • Format — indents JSON with 2 or 4 spaces, or with tab
  • Minify — removes spaces and newlines to reduce size
  • Sort keys — sorts all keys alphabetically
  • Escape — converts JSON into an escaped string for embedding in code
  • Validation — reports syntax errors with precise position

What is JSON?

JSON (JavaScript Object Notation) is the most widely used data exchange format on the web. Used in REST APIs, config files, NoSQL databases and more.

Why format JSON?

Minified JSON is hard to read and debug. Formatting it with proper indentation makes the data structure immediately visible, making development and error checking easier.

Privacy

Your code is never sent to external servers. All processing happens in the browser via pure JavaScript.