JSON Formatter
Paste or drop your JSON, pick an indent width, then format or minify. Invalid documents fail with a helpful message and the error location highlighted — all computation happens locally.
How to use
Beautify, minify and validate JSON right in your browser. No uploads, nothing leaves your device. Your data is processed only inside this browser tab.
FAQ
Is my JSON uploaded anywhere?
No. Parsing and formatting happen in your browser; the network is never touched.
What size files can it handle?
Up to about 5 MB. Larger inputs are rejected with a clear notice instead of freezing the page.
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