Free Developer Tool

JSON Formatter & Validator

Format, beautify, validate and minify JSON instantly. Real-time syntax checking with error highlighting. 100% free, no signup needed.

✓ Real-time validation✓ Syntax highlighting✓ Minify✓ Pretty print✓ No signup
JSON Formatter & Validator
Input JSON
Formatted Output
Formatted JSON will appear here...
Waiting for input...
Keys: 0  |  Size: 0 B

Frequently Asked Questions

What is JSON formatting? +
JSON formatting (or pretty-printing) adds proper indentation and line breaks to JSON data, making it human-readable. Minified JSON removes all whitespace for smaller file sizes.
Why is my JSON invalid? +
Common JSON errors: missing quotes around keys, trailing commas, using single quotes instead of double quotes, and unescaped special characters in strings.
Is my JSON data safe? +
Yes. All processing happens entirely in your browser using JavaScript. Your JSON data is never sent to any server.