JSON Formatter
Format, validate and minify JSON instantly, with clear error messages when something’s wrong.
Your privacy is safe, this tool runs entirely in your browser. Nothing you enter is uploaded to or stored on our servers.
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How to use JSON Formatter
- 1Paste your JSON into the input box.
- 2Click “Format” to beautify it, or “Minify” to compress it.
- 3If the JSON is invalid, you’ll see exactly what went wrong.
- 4Copy the formatted result with one click.
About the JSON Formatter
The JSON formatter and validator turns messy, minified or hand-written JSON into clean, readable, properly indented JSON. It also works the other way, minify your JSON to remove whitespace and reduce its size before storing or sending it.
If your JSON contains a syntax error, the tool tells you exactly what is wrong so you can fix it quickly. Everything runs locally in your browser, which keeps even sensitive data completely private.
Frequently asked questions
How do I format or beautify JSON?
Paste your JSON into the box and click “Format”. The tool validates it and re-indents it with clean spacing so it is easy to read, then you can copy the result with one click.
How do I minify JSON?
Paste your JSON and click “Minify”. All unnecessary whitespace and line breaks are removed, producing the smallest valid JSON, ideal for APIs and storage.
How do I fix a JSON syntax error?
Click “Format”, if the JSON is invalid, the tool shows the exact error message and where parsing failed, so you can spot missing commas, quotes or brackets.
What is the difference between beautify and minify?
Beautify adds indentation and line breaks to make JSON human-readable, while minify strips them to make the file as small as possible. The data stays identical.
Is my JSON sent to a server?
No. All formatting and validation happens locally in your browser, your data never leaves your device, safe for sensitive payloads.
Is the JSON formatter free?
Yes, completely free with no limits or sign-up.