JSON Formatter
Format and beautify JSON online for free. Pretty-print JSON with proper indentation instantly. No signup required - runs entirely in your browser.
How to Use This JSON Formatter
- Paste your unformatted JSON code into the input area
- The formatter will automatically beautify your JSON with proper indentation
- Click "Copy" to copy the formatted JSON to your clipboard
- If there's a syntax error, you'll see a helpful error message
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for humans to read and write, and easy for machines to parse and generate. It's widely used in web APIs, configuration files, and data storage.
Features
- Instant JSON formatting and beautification
- Syntax validation with clear error messages
- Auto-format as you type (with debounce)
- Line count display for input and output
- One-click copy to clipboard
- 100% client-side - your data never leaves your browser
- No signup or registration required
Common Use Cases
- Formatting API responses for better readability
- Cleaning up minified JSON data
- Validating JSON syntax before deployment
- Debugging JSON configuration files
- Preparing JSON for documentation
Frequently Asked Questions
Is my JSON data private?
Yes, all processing happens entirely in your browser. Your JSON data is never sent to any server or stored anywhere. The formatter runs 100% client-side, so your sensitive data like API keys, configuration files, and personal information remain completely private.
What happens with invalid JSON?
When you paste invalid JSON, the formatter will display a clear error message indicating what went wrong and where the syntax error is located. This helps you quickly identify and fix issues like missing commas, unclosed brackets, or incorrect formatting.
Can I format large JSON files?
Yes, the formatter can handle large JSON files. All processing is done client-side in your browser, so performance depends on your device. There is no file size limit imposed by the tool, and it works well with typical API responses and configuration files.