Developer
JSON Formatter / Validator
Free online JSON formatter that beautifies (indents), minifies and validates JSON syntax. Everything runs in your browser — your data is never uploaded — perfect for debugging.
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How to use
- 1Paste or type your JSON.
- 2Choose beautify or minify.
- 3Syntax errors are flagged in real time.
- 4Copy the formatted result.
FAQ
Is my data uploaded?
No. All processing happens in your browser — nothing is sent to a server.
Can it minify JSON?
Yes, the minify option strips whitespace and line breaks to reduce size.
How large a JSON can it handle?
A few MB works fine; very large files may be limited by browser performance.