JSON Formatter & Validator
Format, minify and validate JSON with syntax highlighting and error detection.
How to Use
- Paste your JSON into the input box.
- Click "Format" to pretty-print with 2-space indentation, or "Minify" to collapse to one line.
- Any syntax errors are detected and shown with the line and character position.
- Click "Copy" to copy the output to your clipboard.
Frequently Asked Questions
QWhat is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write, and easy for machines to parse and generate.
QIs my data sent to a server?
No — all processing happens entirely in your browser. Your JSON never leaves your device.
QWhat errors can this detect?
Any JSON syntax error: missing commas, unclosed brackets, invalid escape sequences, trailing commas, and incorrect value types.
About This Tool
Uses the browser's built-in JSON.parse() for validation and JSON.stringify() with indentation for formatting — zero dependencies, instant results.