JSON Formatter & Validator Online Free Tool
This free online JSON formatter and validator tool helps developers to format, beautify, and validate JSON data. Perfect for debugging API responses, cleaning up minified JSON, or validating JSON structure before use in your applications.
JSON (JavaScript Object Notation) is the most popular data interchange format used in web APIs and modern applications. This tool makes it easy to read and understand complex JSON structures by properly indenting and formatting the data.
Enter your JSON data to format and validate.
Features of JSON Formatter & Validator
- Format/Beautify JSON: Automatically indent and format JSON for better readability
- Validate JSON: Check if your JSON syntax is correct and find errors
- Minify JSON: Remove whitespace to reduce file size
- Copy to Clipboard: Easily copy the formatted result
- Error Detection: Get detailed error messages for invalid JSON
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is based on a subset of JavaScript Programming Language Standard.
Common Use Cases
- API Response Debugging - Format API responses for easier reading
- Configuration Files - Validate and format JSON config files
- Data Exchange - Ensure data structure is valid before sending
- Code Development - Format JSON before hardcoding in applications
- Learning - Understand JSON structure and syntax
JSON Syntax Rules
- Data is in name/value pairs
- Data is separated by commas
- Curly braces hold objects
- Square brackets hold arrays
- Keys must be strings in double quotes
- Values can be strings, numbers, objects, arrays, true, false, or null