JSON Formatter
Format, validate, and minify JSON with syntax highlighting-ready output.
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What is a JSON Formatter?
A JSON formatter takes raw or minified JSON and transforms it into a readable, properly indented structure. It also validates your JSON syntax and reports errors with helpful messages so you can fix issues quickly.
Developers use JSON formatters daily when working with APIs, configuration files, and data exports. Our tool processes everything locally in your browser for speed and privacy.
How to Use This Tool
Paste your JSON into the input textarea.
Click Format to beautify with proper indentation, or Minify to compress into a single line.
If your JSON is invalid, an error message will explain what went wrong.
Use Copy to copy the formatted output, or Clear to start over.
JSON Formatter Features
Beautify / Format
{ "name": "value" }
Add proper indentation and line breaks for readability.
Minify
{"name":"value"}
Remove all unnecessary whitespace to reduce file size.
Validate
✓ Valid JSON
Check syntax and highlight errors before formatting.
Indent Options
2 or 4 spaces
Choose your preferred indentation size for formatted output.
Benefits of Formatting JSON
- Debug API responses and configuration files faster
- Make minified JSON human-readable in seconds
- Catch syntax errors before deploying to production
- Reduce payload size by minifying for APIs
- Share clean, readable JSON with your team
- Work offline — no server upload required
Frequently Asked Questions
How do I format JSON?
Paste your JSON into the input area and click the "Format" button. The tool will beautify it with proper indentation instantly.
What is JSON minification?
Minification removes all unnecessary whitespace, line breaks, and indentation from JSON, producing the smallest possible valid JSON string.
Why does my JSON show an error?
Common issues include trailing commas, single quotes instead of double quotes, unquoted keys, or missing brackets. The error message points to the problem area.
Is this JSON formatter free?
Yes, it's completely free with no limits on file size beyond your browser's capabilities.
Is my JSON data sent to a server?
No. All formatting and validation happens entirely in your browser. Your data stays on your device.
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