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JSON Formatter & Validator
Paste JSON to pretty-print, minify, or validate it. Parsing happens locally in your browser — your data is never sent to a server.
Format JSON
100% local — your JSON never leaves your device.
Frequently asked questions
Is my JSON data uploaded?
No. Parsing and formatting run entirely in your browser's JavaScript engine — nothing is transmitted anywhere.
What happens if my JSON is invalid?
You'll see a clear error message describing what's wrong, based on the browser's native JSON parser.
Doing this by hand every week? That's exactly what I remove.
If this conversion is one small step in a bigger workflow — say, files arriving by email, getting converted, renamed and filed by a person every time — I build software that does the whole thing automatically. My clients get back up to 18 hours a week this way.
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