JSON Formatter & Validator

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 has become the de-facto standard for data exchange on the modern web, replacing XML in most RESTful APIs and configuration files.

Why Use a JSON Formatter?

Raw JSON data returned from servers is often "minified"—meaning all unnecessary whitespace is removed to save bandwidth. While efficient for computers, this looks like a giant wall of text to humans.

• Readability: A formatter uses indentation (typically 2 or 4 spaces) to structure nested objects and arrays visually, making the data structure instantly understandable.
• Validation: It handles syntax checking. If you miss a comma or a closing brace, this tool will flag the error immediately, preventing runtime crashes in your application.
• Minification: Conversely, if you are sending data to a server or storing it, you can "minify" it to remove spaces and reduce file size.

Common JSON Errors

• Trailing Commas: Unlike JavaScript objects, JSON does not allow a comma after the last item in an array or object.
• Single Quotes: JSON standard requires double quotes "key": "value". Single quotes are invalid.
• Undefined Values: JSON cannot store functions or undefined. It strictly supports strings, numbers, booleans, null, arrays, and objects.