What is JSON and what is it used for?

JSON (JavaScript Object Notation) is a lightweight data format used for storing and exchanging data. It's human-readable and widely used in web APIs, configuration files, and data storage. JSON supports objects, arrays, strings, numbers, booleans, and null values.

How do I fix invalid JSON?

Common JSON errors include: missing quotes around keys, trailing commas, single quotes instead of double quotes, and unescaped special characters. Use our validator to identify the exact line and character where the error occurs, then fix the syntax issue.

What's the difference between JSON formatting and minifying?

Formatting (beautifying) adds indentation and line breaks to make JSON readable for humans. Minifying removes all unnecessary whitespace to reduce file size for production use. Both contain the same data, just presented differently.

Why are my JSON keys not in quotes?

Valid JSON requires all keys to be wrapped in double quotes. JavaScript objects allow unquoted keys, but JSON does not. Example: {name: 'test'} is invalid JSON, but {"name": "test"} is valid.

How do I escape special characters in JSON?

Use backslash (\) to escape special characters: \" for quotes, \\ for backslash, \n for newline, \t for tab, \r for carriage return. Unicode characters can be escaped as \uXXXX where XXXX is the hex code.

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