JSON Formatter
Paste messy or minified JSON and get clean, readable output in one click. This formatter pretty-prints with your choice of indentation, minifies to a single line, and reports syntax errors so you can spot problems fast. Everything runs locally in your browser — your data is never sent anywhere.
How to use the JSON Formatter
- 1Paste your JSON. Drop raw JSON into the input box.
- 2Choose an action. Beautify with 2 or 4 spaces, or minify to a compact single line.
- 3Copy the result. Use the copy button to grab the formatted output.
Frequently asked questions
Is my JSON uploaded to a server?
No. Formatting happens entirely in your browser with JavaScript, so your data never leaves your device.
Why am I getting a syntax error?
Common causes are trailing commas, single quotes instead of double quotes, or unquoted keys. The error message points to where parsing failed.