JSON Formatter & Validator

Beautify, validate, fix, and minify JSON payloads with syntax error detection.

About this tool

Clean up minified API responses and identify syntax bugs with instantaneous client-side validation.

How to use this tool

  1. Paste raw JSON
  2. Click Format JSON or Minify
  3. Copy clean formatted output

How it works

Parses input against ECMAScript JSON specifications, highlighting precise character offsets on errors.

When to use this tool

  • Debugging backend REST responses
  • Inspecting configuration files

Frequently asked questions

Is my JSON sent to a server?

Never. Parsing is 100% local in your browser.

Limitations

Payloads up to 20MB supported smoothly.

Privacy

Completely private. Safe for proprietary tokens and configurations.