JSON Formatter
Paste JSON to validate, format, or minify it instantly.
Indent
INPUT
OUTPUT
Formatted output will appear here.
How it works
- 1 Paste your JSON into the input panel on the left.
- 2 Errors are highlighted instantly with the exact line and column number.
- 3 Switch between Pretty, Minified, and Sorted views using the toolbar.
Why use this tool
- ✓ Real-time validation with precise, actionable error messages.
- ✓ Syntax highlighting for keys, strings, numbers, booleans, and null.
- ✓ Dark mode for extended coding sessions.
- ✓ Minify mode reduces payload size for production use.
Use cases
- → Debugging API responses during development.
- → Formatting config files before committing to version control.
- → Minifying JSON to reduce bundle or network payload size.
- → Sorting keys alphabetically for cleaner diffs.
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