JSON Validator & Formatter
Validate, format, and beautify your JSON data instantly with our free online JSON validator tool
Input JSON
Formatted Output
What is JSON Validation?
JSON (JavaScript Object Notation) validation is the process of checking whether a JSON string follows the correct syntax rules and structure. Our JSON validator helps developers and data analysts ensure their JSON data is properly formatted and error-free before using it in applications, APIs, or data processing workflows.
JSON has become the standard data interchange format for web applications, REST APIs, and configuration files. Even a small syntax error can cause applications to fail, making validation an essential step in the development process.
Key Features of Our JSON Validator
Real-time Validation
Get instant feedback as you type or paste JSON data. Our validator immediately identifies syntax errors and highlights problematic areas.
JSON Formatting & Beautification
Transform minified or poorly formatted JSON into readable, properly indented code with consistent spacing and structure.
Error Detection & Reporting
Detailed error messages pinpoint exactly where issues occur, making it easy to fix JSON syntax problems quickly.
JSON Minification
Compress your JSON by removing unnecessary whitespace and formatting to reduce file size for production use.
How to Use the JSON Validator
- Paste or type your JSON data in the input field
- The validator automatically checks for syntax errors in real-time
- View the formatted output in the right panel
- Use the "Validate & Format" button for detailed validation results
- Copy the formatted JSON or minify it for production use
- Load sample JSON data to test the validator functionality
Benefits of Using Our JSON Validator
- Save development time by quickly identifying JSON syntax errors
- Improve code quality with properly formatted JSON
- Reduce debugging time in applications and APIs
- Ensure data integrity before processing or transmission
- Free to use with no registration or downloads required
- Works on all devices and browsers
- Privacy-focused - all processing happens in your browser
Common JSON Validation Errors
Our validator helps you identify and fix common JSON errors including missing commas, unclosed brackets, invalid escape sequences, duplicate keys, and incorrect data types. Understanding these common mistakes helps you write better JSON code and debug issues more efficiently.
Whether you're working with API responses, configuration files, or data exports, our JSON validator ensures your data is properly structured and ready for use in any application or system.