JSON Formatter Tool
Format, minify, and validate JSON. Syntax highlighting makes errors easy to spot.
Input
How to Use
1
Enter JSON
Type or paste your JSON into the text area.
2
Format or Minify
Click "Format JSON" to prettify or "Minify JSON" to compress.
3
Copy Result
Copy the result to clipboard or download as a file.
About JSON Formatter
An online tool to format JSON for readability or minify it for size reduction. Includes syntax validation and highlighting. All processing happens in your browser, keeping your data private.
Features
- Format & MinifyOne-click formatting for readability. Minify to reduce size for faster API requests.
- Syntax HighlightingColor-coded keys, strings, numbers, and booleans. Errors are easy to spot.
- ValidationReal-time JSON syntax checking with error line and position display.
- Privacy ProtectedAll processing happens in your browser. Data is never sent to servers.
Use Cases
- Debug API responses
- Edit configuration files
- Reduce JSON file size
- Find and fix syntax errors
- Improve log data readability
FAQ
Is the JSON formatter free?
Yes, it is completely free. No registration required.
Why is my JSON invalid?
Common issues: trailing commas, single quotes, comments, or missing quotes around keys.
Can it handle large JSON files?
Yes, within browser memory limits. Usually handles files up to several MBs.
Is my data safe?
All processing happens locally in your browser. Data is never sent to our servers.
Can I change the indentation?
Yes, choose from 2 spaces, 4 spaces, or tabs.