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JSON Formatter & Validator
Format, minify, and validate JSON in your browser. No data leaves your device.
Indent:
All processing happens in your browser. No data is sent to any server.
- Paste your JSON in the input box above
- Choose indentation (2 spaces, 4 spaces, or tab) and click Format to pretty-print, Minify to compress, or Validate to check syntax
- Click Copy Result to copy the formatted output to your clipboard
All processing happens in your browser — nothing is sent to any server.
What does this tool do?
It formats (pretty-prints) JSON with your choice of indentation, minifies JSON by removing whitespace, and validates JSON with line and column error reporting.
Is my data safe?
Yes. This tool runs entirely in your browser. Your data never leaves your device.
What if my JSON has errors?
The tool reports the exact line and column where the error occurs, making it easy to find and fix syntax issues.