Output
How to Use JSON Formatter
1
Paste your JSON into the input box.
2
Click Format to prettify, or Minify to compress.
3
Copy the result with one click.
Features
✓Server-side JSON validation with PHP
✓Pretty-print with 2-space indentation
✓Minify to single line
✓Error line and message shown on invalid JSON
✓Shows type (Array/Object) and key count
Why Use This Tool
Debug API responses quickly
Readable JSON for code review
Minified JSON reduces payload size
No browser extension needed
Frequently Asked Questions
What happens with invalid JSON?
The tool shows the exact error message from PHP's JSON parser, including the position of the error.
Can I format large JSON files?
Yes, up to 500KB of JSON input is supported.