The JSON Formatter beautifies, validates, and minifies JSON. Paste your JSON to see it neatly indented with syntax highlighting, or minify it to a single line — and if there’s a syntax error, the tool points it out.
It’s built for developers working with APIs, config files, and data exports who need readable, valid JSON fast.
How to format JSON
- Paste your JSON into the input area.
- Click format to beautify it with proper indentation, or minify to compress it.
- Fix any highlighted errors, then copy or download the result.
Beautify vs minify
Beautifying adds indentation and line breaks so JSON is easy to read and debug. Minifying strips whitespace to shrink the payload for production. This tool does both, and validates the JSON either way.
Frequently Asked Questions
How do I format JSON online?
Paste your JSON and the formatter indents and colour-codes it so it’s easy to read. Invalid JSON is flagged so you can fix it.
How do I validate JSON?
The tool checks your JSON as you paste it and reports the location of any syntax error, such as a missing comma or bracket.
How do I minify JSON?
Choose the minify option to remove all unnecessary whitespace and output the JSON as a single compact line.
Is my JSON data private?
Yes. Formatting happens entirely in your browser, so your data is never uploaded to a server.
Is the JSON formatter free?
Yes, it is completely free with no sign-up.