JSON Formatter & Validator – Free Online
Paste raw JSON to format it with proper indentation, validate it, or minify it for production. Runs entirely in your browser.
How to Use
- 1
Paste your raw JSON into the input field
- 2
Click "Format" to pretty-print or "Minify" to compress
- 3
Copy the result with the copy button
Frequently Asked Questions
What does JSON formatting do?
Formatting adds proper indentation and line breaks to JSON, making it easier to read. Minifying removes all whitespace to reduce file size.
Can I validate my JSON with this tool?
Yes — if your JSON has a syntax error, the tool shows an error message and highlights the problem.
Is there a size limit for JSON input?
The tool handles JSON files of several MB without issues. Very large files may be slower to format.
Is my JSON data safe?
Yes — all processing happens locally in your browser. Your data is never sent to any server.