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JSON Formatter & Validator

Paste your JSON to format, beautify, minify, or validate it instantly.

Your data stays in your browser — nothing is uploaded to any server.

or try sample data

What is JSON Formatter?

JSON Formatter is a free tool for formatting, beautifying, minifying, and validating JSON data. Paste in raw or minified JSON and get perfectly indented, human-readable output. Great for debugging API responses, cleaning up config files, and validating data structures.

  • Format & beautify — pretty-print JSON with customizable indentation (2 spaces, 4 spaces, or tabs).
  • Minify — compress JSON by removing all whitespace for smaller payloads.
  • Validate — check if your JSON is valid with detailed error messages and line numbers.
  • Sort keys — alphabetically sort object keys for consistent ordering.
  • Privacy-first — all processing happens in your browser.