JSON Formatter & Validator
Paste messy JSON to beautify it with proper indentation, validate its syntax, or minify it. Runs entirely in your browser — nothing is uploaded.
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Start freeHow to use the JSON Formatter & Validator
- 1Enter or paste your input.
- 2Adjust any options to fit your needs.
- 3Copy the result — everything runs in your browser.
Is the JSON Formatter & Validator free and private?
Yes. The JSON Formatter & Validator is completely free, requires no sign-up or account, and has no usage limits. Your input is processed to produce the result and is never stored, logged, or used for training. Everything runs locally in your browser — nothing is uploaded at all.
Frequently asked questions
Is my JSON uploaded anywhere?
No. Formatting happens entirely in your browser — your data never leaves your device.
What if my JSON is invalid?
The tool shows the exact parse error and position so you can fix it quickly.
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References & further reading
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