About JSON Formatter Tool
Our JSON Formatter & Validator is a free online tool that helps developers format, validate, and beautify JSON (JavaScript Object Notation) data. Whether you're working with API responses, configuration files, or data structures, this tool makes JSON readable and easy to debug.
Key Features
- Instant JSON validation with detailed error messages
- Beautify (prettify) or minify JSON with one click
- Syntax highlighting for better readability
- Support for large JSON files up to 10MB
- Copy formatted JSON to clipboard instantly
- 100% client-side processing - your data stays private
How to Use JSON Formatter
- Paste your JSON data into the input field
- The tool automatically validates and formats your JSON
- View errors if JSON is invalid, with line numbers
- Click "Beautify" to format or "Minify" to compress
- Copy the result with one click
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 development for API responses, configuration files, and data storage. JSON uses key-value pairs and supports strings, numbers, booleans, arrays, and nested objects.
Common JSON Use Cases
- REST API request and response bodies
- Configuration files for applications
- Data exchange between client and server
- NoSQL database document storage
- Package managers (package.json, composer.json)