JSON Formatter
Beautify and format JSON with proper indentation
About this Tool
JSON Formatter is a free, privacy-first tool built for developers. Beautify and format JSON with proper indentation
â100% Client-Side: All processing happens in your browser. No data is ever sent to our servers.
âFast & Efficient: Instant results with no server roundtrips or delays.
âFree Forever: No sign-up, no limits, no hidden fees. Use as much as you need.
âFile Support: Upload files directly or paste content. Your choice.
âHistory: Your recent conversions are saved locally for quick access.
Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to our servers. While we strive for accuracy, please verify critical data before use in production environments. FormatKit is not responsible for any data loss, corruption, or issues resulting from tool usage.
Keyboard Shortcuts
How to Use JSON Formatter
Upload a JSON file or paste your JSON into the input field and it will be automatically formatted with proper indentation. All processing happens in your browser - no data is sent to our servers.
Features
- Instant formatting as you type
- Syntax validation with error messages
- Copy formatted JSON with one click
- Download as .json file
- Supports large JSON files (100KB+)
- Customizable indentation (2 spaces, 4 spaces, or tabs)
Common Use Cases
- Debugging API responses: Quickly inspect and understand JSON returned from REST APIs
- Code cleanup: Format minified JSON from production systems for easier reading
- Configuration files: Validate and beautify JSON configuration files before deployment
- Learning JSON: Understand JSON structure by seeing properly formatted examples
FAQ
Q: Is my data secure?
Yes! All JSON processing happens entirely in your browser. Your data never leaves your device.
Q: What's the maximum file size?
The tool can handle JSON files up to several megabytes. For optimal performance, we recommend files under 5MB.
Q: Can I format multiple JSON files at once?
Yes! You can select multiple JSON files at once for batch processing. Simply select multiple files from the file picker or drag and drop them together. Each file will be formatted individually and displayed in the output with its filename.
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