JSON Formatter & Code Beautifier
Format and beautify JSON with proper indentation. Also supports JavaScript, CSS, HTML, and PHP. Make minified or messy code readable again.
How It Works
Paste your minified or messy code in the input area
Select the code type (JSON, JS, CSS, HTML, PHP)
Click "Format Code" to beautify your code
Features
Frequently Asked Questions
Is this tool really free?
Yes, 100% free with no hidden costs or limits. All processing happens in your browser.
Are my files secure?
Absolutely. All formatting happens locally in your browser – your code never leaves your device.
What does JSON formatting do?
Formatting adds proper indentation, line breaks, and spacing to make JSON and code more readable without changing its functionality.
JSON Formatter Online — The Complete Guide
Need to format JSON online? Our free JSON beautifier prettifies minified JSON, validates syntax, and helps fix JSON errors — essential for developers working with APIs, configuration files, and data processing.
Prettify JSON Free
Prettify JSON free with proper indentation and line breaks. Paste minified JSON that is impossible to read, and instantly get formatted output with clear structure. Choose 2-space or 4-space indentation based on your preference.
JSON Formatter Online
Our JSON formatter online transforms compact JSON into human-readable format. See nested objects and arrays clearly, with syntax highlighting that makes it easy to navigate complex data structures and identify specific values.
Validate JSON Syntax
Validate JSON syntax and catch errors instantly. Our tool identifies missing commas, unquoted keys, trailing commas, and other common JSON mistakes. Error messages point to the exact line and character position of the problem.
Tips for Working with JSON
- JSON keys must be strings in double quotes
- No trailing commas allowed after the last element
- Use the minify option to reduce file size for production
- All processing happens locally — your data stays private