Free JSON Formatter Online - Beautify & Validate JSON

JSON Beautification

JSON (JavaScript Object Notation) is compact by design, but minified JSON without whitespace is difficult to read and debug. Our formatter adds consistent indentation and line breaks to make JSON structures clear.

Formatting Options

• Indentation: Choose 2 spaces, 4 spaces, or tabs
• Key sorting: Alphabetize keys for consistent ordering
• Compact arrays: Keep short arrays on single lines

Validation

The formatter validates JSON syntax while beautifying. Invalid JSON produces clear error messages indicating the problem location. This catches common issues like trailing commas, unquoted keys, and mismatched brackets.

Common Use Cases

API responses: Beautify minified API output for debugging and documentation.

Configuration files: Clean up and standardize JSON config files before committing.

Log analysis: Format single-line JSON logs for readability.