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About the JSON Formatter & Validator
Paste JSON to validate it, pretty-print it with 2 or 4 spaces or a tab, minify it or sort the keys. If the JSON is invalid you get the parser’s error message so you can find the problem.
How to use it
- Paste your JSON into the left box.
- Press Format, Minify or Validate.
- Copy the result or fix the reported error.
Frequently asked questions
Is my JSON sent to a server?
No. It is parsed with your browser’s built-in JSON parser, so API keys or private data never leave your device.
Why does valid-looking JSON fail?
The usual causes are trailing commas, single quotes, unquoted keys and comments. JSON allows none of them.
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Results are estimates for general information. For financial, tax, medical or legal decisions, check with a qualified professional.