JSON Formatter & Validator

Format, validate, beautify & compress JSON. Tree view, syntax error detection, one-click copy. All in your browser.

⚠ JSON Syntax Error
0 chars
JSON Input
Output ✓ Valid
✓ Copied

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What Is JSON and How Do You Format It? A Beginner's Guide

What Is JSON?

JSON (JavaScript Object Notation) is a lightweight data format used to store and exchange data between servers and applications. It's human-readable and widely used in web APIs, configuration files, and databases.

How to Format and Validate JSON

Raw JSON is often minified (all on one line) and hard to read. A JSON formatter adds indentation and line breaks to make it readable. A JSON validator checks for syntax errors like missing commas, brackets, or quotes.

Common JSON Errors to Avoid

Q: What is the difference between JSON and XML?

A: JSON is lighter, faster to parse, and easier to read. XML is more verbose but supports more complex structures and metadata.

Q: How do I minify JSON?

A: Minifying removes all whitespace to reduce file size for faster transmission — our tool does both formatting and minification.

Q: Can JSON contain arrays?

A: Yes, JSON supports both objects (key-value pairs) and arrays (ordered lists of values).

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