JSON Formatter & Validator
Beautify, minify, and validate JSON instantly. 100% private — everything runs in your browser.
Input JSON 0 chars
Output
How It Works
Paste JSON
Paste or type your JSON data into the input box on the left.
Choose Action
Click Beautify to format, Minify to compress, or Validate to check for errors.
Copy Result
Copy the formatted output to your clipboard with one click.
Frequently Asked Questions
Is my JSON sent to a server?
No. All JSON formatting and validation happens in your browser. Your data never leaves your device.
What's the maximum JSON size I can format?
There's no hard limit, but very large JSON files (over 10MB) may slow down your browser. For most use cases, performance is excellent.
What's the difference between Beautify and Minify?
Beautify adds indentation and line breaks for readability. Minify removes all unnecessary whitespace to reduce file size.
Does this tool support JSON with comments?
Standard JSON doesn't support comments. If your JSON has comments, the validator will flag them as errors. Remove comments before formatting.