JSON Prettifier
Format and beautify your JSON code with proper indentation, syntax validation, and error highlighting.
Input JSON
0 characters
Formatted Output
Ready
What is a JSON Prettifier?
A JSON prettifier (also called a JSON formatter or beautifier) is an online tool that transforms compact, minified JSON code into a human-readable format with proper indentation and line breaks. Our JSON prettifier also validates your JSON syntax, highlights errors, and offers minification for production use.
JSON (JavaScript Object Notation) is a lightweight data format used extensively in web development for APIs, configuration files, and data storage. While minified JSON is efficient for machines, it's difficult for humans to read and debug. That's where a JSON formatter becomes essential.
How to Use the JSON Formatter
1. Paste your JSON code into the input editor on the left
2. Click "Prettify" to beautify with proper indentation (2 or 4 spaces)
3. Use "Minify" to compress JSON for production use
4. Enable "Sort keys" to alphabetically organize JSON properties
5. Click "Download" to save the formatted output as a .json file
💡 All processing happens in your browser—your data never leaves your device.
Common Use Cases
• API Response Debugging
Format API responses to quickly identify data structure and troubleshoot issues
• Configuration Files
Beautify package.json, tsconfig.json, and other config files for better readability
• Data Analysis
Make large JSON datasets readable for manual inspection and analysis
• Code Reviews
Present JSON data in a clean, reviewable format for team collaboration
• Learning & Education
Understand JSON structure when learning web development or APIs
Key Features
✓ Syntax Validation
Instantly detect and highlight JSON errors
✓ Beautify & Minify
Format for readability or compress for production
✓ Sort Keys
Alphabetically organize JSON properties
✓ Download Output
Save formatted JSON as a file
Frequently Asked Questions
Is my JSON data safe and private?
Yes! All JSON processing happens entirely in your browser using JavaScript. Your data never leaves your device and is not sent to any server. This makes our tool safe for formatting sensitive configuration files or API responses.
What's the maximum JSON file size?
The upload limit is 5MB for optimal performance and security. Since processing happens in your browser, larger files may cause performance issues. For files larger than 5MB, consider using a desktop JSON editor or breaking the file into smaller chunks.
What's the difference between beautify and minify?
Beautify adds indentation, line breaks, and spacing to make JSON human-readable. Minify removes all unnecessary whitespace to reduce file size for production use. Use beautify for development/debugging, and minify for deployment.
How does JSON validation work?
Our validator checks your JSON against the official JSON specification. It detects common errors like missing commas, unclosed brackets, invalid characters, and trailing commas. Error messages show the exact issue to help you fix it quickly.