JSON Formatter Online — Beautify and Validate JSON for Free

Format, beautify, and validate JSON data. Minify or expand JSON with proper indentation. Free with no sign-up.

How to Use This Tool

  1. Paste your JSON data
  2. Click Format to beautify or Minify to compress
  3. Copy the formatted result

Frequently Asked Questions

Does it validate JSON?

Yes. Invalid JSON is flagged with error messages so you can fix syntax issues.

Can I minify JSON?

Yes. Use the Minify button to compress JSON into a single line.

Your files are processed in your browser and never uploaded to any server. Free, no sign-up, no limits.