Developer Tool
JSON Formatter
Pretty-print or minify JSON data. 100% client-side — no data is sent to any server.
🔒 All processing happens in your browser. No data is sent to any server.
How to use this JSON Formatter
Formatting JSON data is simple with our free online tool. Paste your JSON into the input field above. You can also load a sample JSON to see how the tool works.
Click Pretty-print to format your JSON with proper indentation for readability. Click Minify to remove all whitespace and reduce file size. You can then Copy or Download the formatted JSON.
What this JSON formatter does
- ✓Pretty-print JSON — Format JSON with proper indentation for readability.
- ✓Minify JSON — Remove all whitespace to reduce file size.
- ✓Validate JSON — Check if your JSON is valid and show errors.
- ✓Copy to clipboard — Copy formatted JSON with one click.
- ✓Download as file — Download formatted JSON as a .json file.
- ✓100% client-side — All processing happens in your browser. No data is sent to servers.
Common use cases
- •Format JSON responses from APIs for better readability during development
- •Minify JSON for production to reduce bandwidth and storage costs
- •Validate JSON data before using it in your application
- •Debug JSON structure and content during development
- •Prepare JSON data for documentation or code review
- •Compress JSON for efficient storage in databases or caching
💡 Pro Tips
- •Minify before sending — reduces bandwidth usage in API calls
- •Pretty-print for debugging — easier to read and understand structure
- •Use indentation — 2 spaces is common, but you can customize
- •Validate often — catch errors early before they cause issues