JSON Formatter & Validator
Format, beautify, minify, and validate JSON data. Paste your JSON to clean it up, compress it, or check for syntax errors.
Chain this with other tools →NewHow it works
Paste your JSON data and use the buttons to format (beautify) with 2 or 4 space indentation, minify to remove all whitespace, or validate to check for syntax errors. Perfect for developers working with APIs, config files, or debugging JSON responses. All processing happens in your browser—no data is uploaded to any server.
Common Use Cases
API Development & Testing
Format API responses for easier debugging, validate request payloads before sending, and prettify JSON logs. Essential for REST API and GraphQL development.
Configuration Files
Clean up package.json, tsconfig.json, or any JSON config files. Validate syntax before deployment to catch errors early.
Data Processing
Format JSON exports from databases, beautify minified data for analysis, or prepare JSON for documentation and code reviews.
Production Optimization
Minify JSON files to reduce bundle size and improve load times. Remove unnecessary whitespace while maintaining data integrity.
Frequently Asked Questions
What is JSON formatting?
JSON formatting (or beautifying) adds proper indentation, line breaks, and spacing to JSON data to make it human-readable. Minified JSON removes all whitespace to reduce file size for production use.
How do I validate JSON?
Paste your JSON into the formatter and click the format or validate button. The tool will automatically detect syntax errors like missing commas, unclosed brackets, or invalid values and show you exactly where the problem is.
What's the difference between 2-space and 4-space indentation?
Both create readable JSON, but 2-space indentation is more compact and preferred by JavaScript/Node.js projects, while 4-space is traditional in many other languages. Choose based on your team's coding standards.
Is my JSON data safe when using this tool?
Yes, all JSON formatting and validation happens entirely in your browser using JavaScript. Your data is never uploaded to any server or stored anywhere, ensuring complete privacy and security.
Related Tools
Enhance your workflow by combining these tools together