JSON Formatter
Format and validate JSON online free. Beautify, minify, and validate JSON with error detection. No upload, instant browser-based JSON tool.
" JSON Stats
How to Use JSON Formatter
- Paste or type your JSON data into the input area.
- Choose your action: Format (pretty-print), Minify (compress), or Validate (check for errors). Select your preferred indentation.
- View the formatted output with detailed JSON stats including key counts, objects, arrays, and nesting depth.
Features
- Pretty-Print - formats JSON with customizable indentation (2 spaces, 4 spaces, or tab) for readability.
- Minify - compresses JSON by removing all whitespace for production use.
- Validation - detects JSON syntax errors and shows exact error locations for quick debugging.
- JSON Stats - displays key counts, object counts, array counts, and nesting depth for data analysis.
Why Use Our JSON Formatter
Working with JSON data requires proper formatting for debugging, validation for error checking, and minification for production. Our all-in-one JSON tool gives developers everything they need in a single browser-based interface. No data leaves your machine, making it safe for sensitive configuration files and API responses. The built-in JSON stats provide instant insight into your data structure's complexity.
FAQs
What size JSON can I format?
There is no hard limit. The tool processes JSON in your browser's memory, so performance depends on your device. For very large JSON files (10MB+), formatting may take a moment.
Does it support JSON5 or comments?
No, this tool validates strict JSON as defined by the ECMAScript specification. Comments, trailing commas, and single-quoted strings are not valid JSON and will be flagged as errors.
Can I download the formatted JSON?
Yes, use the "Download" button to save the formatted or minified output as a .json file. You can also copy the result to your clipboard with one click.