JSON Formatter & Validator
Format, validate, and minify JSON with a simple online tool. Paste your JSON, and instantly format it with proper indentation or minify it for production.
- JSON data never leaves your device
- No server upload required
- Works completely offline
- No login or signup needed
How It Works
Paste or type your JSON into the text area. Click 'Format' to beautify it with proper indentation and line breaks, or 'Minify' to compress it by removing whitespace. The validator runs automatically and shows errors if your JSON is invalid. You can copy the formatted result or download it as a .json file. All processing is done in your browser using JavaScript's native JSON parser.
Frequently Asked Questions
What is JSON formatting?
JSON formatting (or beautifying) adds proper indentation and line breaks to make JSON human-readable.
What does minify mean?
Minifying removes all unnecessary whitespace and line breaks, making the JSON compact for production use.
How do I know if my JSON is valid?
The tool validates your JSON automatically and displays an error message if it's invalid.
Is there a size limit?
The tool can handle large JSON files, but performance depends on your browser's capabilities.