JSON Formatter & Validator

Format, minify, and validate JSON instantly. Everything runs in your browser — nothing is sent to a server.

Output

How to use

Paste your JSON into the input area above. Click Format to pretty-print with 2-space indentation, or Minify to compress into a single line. Invalid JSON will show an error with the exact position of the problem.

Your data never leaves your browser. This tool uses the built-in JSON.parse() and JSON.stringify() methods — no external requests are made.