JSON Formatter

Free JSON formatter and validator. Beautify, minify, and validate JSON with syntax highlighting and error reporting.

How the JSON Formatter works

The formatter parses your input string into a JavaScript object using JSON.parse, which also validates the syntax and reports errors. It then re-serializes the object with JSON.stringify and the chosen indentation level, producing neatly structured or minified output.

How to use the JSON Formatter

  1. 1The JSON formatter is designed to be simple and fast.
  2. 2Paste your JSON.
  3. 3Press Format.
  4. 4Copy the output.
  5. 5Your result is shown immediately.

Examples

  • Minified = 2-space indented
  • Choose 2, 4 or tab indentation

Benefits

  • Completely free with no signup required.
  • Runs entirely in your browser for instant results and privacy.
  • Works on mobile, tablet and desktop.
  • Results can be copied with one click.

Frequently Asked Questions

Is the JSON formatter free to use?

Yes. The JSON formatter is 100% free, with no signup, no watermark and no hidden limits.

Does the JSON formatter store my data?

No. All calculations and processing happen locally in your browser. Nothing is uploaded to a server.

Does the JSON formatter work on mobile?

Yes. The JSON formatter is fully responsive and works on phones, tablets and desktop computers.

What does JSON formatting do?

Formatting adds proper indentation and line breaks to minified JSON, making it readable. Minifying removes all whitespace to reduce file size.

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