JSON Formatter
Beautify, minify, and validate JSON instantly.
Runs 100% in your browser — nothing is uploaded
Format, minify, and validate JSON in your browser. Paste messy JSON to pretty-print it with your chosen indentation, collapse it to a single line, and get clear error messages that pinpoint problems. Copy or download the result. Nothing is uploaded.
Frequently asked questions
Does it validate JSON?
Yes. Invalid JSON produces a clear error message so you can find and fix the problem quickly.
Can I minify as well as beautify?
Yes — pretty-print with 2- or 4-space (or tab) indentation, or minify to a single compact line.
Is my JSON sent anywhere?
No. Parsing and formatting happen entirely in your browser, so your data stays private.
How big a file can it handle?
It handles large documents comfortably, limited only by your device's memory since everything runs locally.
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