JSON Formatter & Validator

JSON Input

Formatted JSON

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Valid JSON

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Number of Keys

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Formula: JSON.stringify(JSON.parse(input), null, 2)

JSON Formatter

JSON formatting makes minified or compact JSON human-readable by adding proper indentation and line breaks.

JSON.stringify(JSON.parse(input), null, 2)

The JSON is parsed to validate it, then re-serialized with 2-space indentation.

{"name":"John","age":30} = { "name": "John", "age": 30 }

Minified JSON expanded to readable format

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format used for data exchange between servers and web applications.

How do I validate JSON?

Paste your JSON into the input. If it parses successfully, it is valid JSON. If not, you will see the error message.

What is the difference between JSON and JavaScript objects?

JSON is a text format with strict rules (double quotes required, no trailing commas). JavaScript objects are live programming constructs.