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JSON Formatter & Validator

Structure complex objects for readability, or check JSON for syntax errors. Minifying is handy for sending payloads over a REST API.

Indent:
Input code
Result

Use cases

  • Checking an API response for a valid structure
  • Reading large configuration arrays comfortably
  • Minifying JSON before sending it to cut down traffic

FAQ

What happens if the JSON is invalid?

You get a parse error describing the problem — that is exactly what validation shows you.

Are comments supported in JSON?

No, the JSON standard doesn't support comments. For configs with comments, use JSON5 or YAML instead.

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Validate JSON and get a precise error description when it's broken. Runs in your browser.

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Convert JSON to YAML and back in your browser, with readable parse errors.