Format, validate, and minify JSON instantly. Free online tool with syntax validation and customizable indentation.
Pretty print with 2 or 4 space indentation
Real-time JSON syntax validation
Detailed error messages for invalid JSON
Minify JSON for production
Load sample JSON data
Copy formatted output to clipboard
Download as .json file
100% client-side - your data stays private
Format API responses for debugging and documentation.
Validate and beautify JSON config files for better readability.
Pretty print JSON data to understand complex nested structures.