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 the JavaScript Programming Language and is commonly used for transmitting data between a server and web application.

Why Format JSON?

JSON data is often minified for efficient transmission, making it difficult to read. Formatting (prettifying) JSON adds proper indentation and line breaks, making it much easier to understand the structure and debug issues.

JSON Prettify Features

• Format JSON with customizable indentation (2 spaces, 4 spaces, or tabs)
• Option to use single or double quotes for display
• Validate JSON syntax with detailed error messages
• Minify JSON to reduce file size
• Load JSON from URLs or upload files
• Sample data for testing
• Copy formatted output to clipboard
• Download formatted JSON as a file

Common JSON Use Cases

• API Development: Format API responses for debugging
• Configuration Files: Make config files readable
• Data Exchange: Prepare data for transmission
• Code Review: Improve readability of JSON data
• Documentation: Display JSON examples clearly

JSON Syntax Rules

Valid JSON must follow specific syntax rules: objects use curly braces {}, arrays use square brackets [], strings must be in double quotes, and values can be strings, numbers, objects, arrays, true, false, or null.