JSON Formatter
Paste your JSON data; format it with proper indentation, minify it, or catch syntax errors.
Your files never leave your device — everything runs in your browser.
How to Use
- 1Paste your JSON data into the box.
- 2Click 'Format / Validate' to make it readable, or 'Minify' to compact it to one line.
- 3An error message appears if the JSON is invalid.
Frequently Asked Questions
Why does my JSON fail to format?
Formatting fails when the JSON has a syntax error — a missing comma, an unquoted key, or a trailing comma. The error message points to roughly where the problem is.
What's the difference between formatting and minifying?
Formatting adds indentation and line breaks so the JSON is easy to read. Minifying strips all unnecessary whitespace to make the file as small as possible, useful for sending over a network.
Is my JSON data uploaded anywhere?
No, all formatting and validation happens locally in your browser. Your data is never sent to a server.