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JSON Formatter and Validator

Paste a JSON payload to pretty-print it, check that it parses, or minify it for a request body. Parsing happens locally, so API responses and config files stay on your machine.

How to use it

  1. Paste JSON into the editor, or load a sample payload.
  2. Choose Format to indent it, or Minify to collapse whitespace.
  3. Read the validation message, then copy the result.

Useful for

  • Pretty-print API responses
  • Find a missing comma or quote
  • Minify JSON before sending it

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Questions about JSON Formatter & Validator

Is my JSON data uploaded to a server? +

No. All parsing, formatting, and validation runs entirely in your browser. Nothing leaves your device.

Can I minify JSON as well as pretty-print it? +

Yes. Toggle between Beautify and Minify modes, or switch to Tree View for nested exploration.

What happens when my JSON is invalid? +

The validator surfaces a clear error message with the approximate line/position so you can fix it quickly.