Developer Tools
JSON Formatter
Format, validate, prettify, and minify JSON data. Find errors instantly with line numbers.
100% Private
Your files never leave your browser. No server upload.
How It Works
Paste or type JSON into the input area. Click Format to prettify, Minify to compress, or Validate to check for errors. Use Copy to copy the result.
Frequently Asked Questions
No. All processing happens in your browser. Your JSON data never leaves your device.
Yes. The tool works entirely in browser memory. Very large files may take longer to process.
Yes. If there's a syntax error, the tool will show the line number where the error occurred.