JSON Formatter

Format, validate and minify JSON — pretty-print it or collapse it to one line.

Indent

Parsed and formatted in your browser — nothing is uploaded.

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JSON Formatter — frequently asked questions

Is my JSON sent to a server?+

No. It's parsed and formatted entirely in your browser with JSON.parse.

It says invalid JSON — why?+

The message shows where parsing failed. Common causes: trailing commas, single quotes, or unquoted keys — none of which are valid JSON.

Can it handle large files?+

Yes, within your browser's memory. Very large files may be slow to render.

Laddar ni upp mina filer till en server?+

Nej — alla verktyg här bearbetar dina filer helt på din enhet, och inget laddas upp till en server. Det enda undantaget är AI-verktygen, som skickar den extraherade texten (inte filen) till Claude för att göra sitt jobb.

Finns det en filstorleksgräns?+

Vi sätter ingen konstgjord gräns, men eftersom bearbetningen sker i din webbläsare begränsas mycket stora filer (500+ MB eller 1 000+ sidor) av din enhets minne, inte av oss.