JSON Formatter & Validator

Free online tool to format (prettify) or minify JSON data. Validate syntax and fix errors instantly.

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What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It 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.

Why Format JSON?

APIs and servers often return minified JSON (no whitespace) to save bandwidth. This makes it hard to read. A JSON Formatter beautifies this data by adding proper indentation and newlines, making it human-readable for debugging.