JSON Formatter & Validator
Pretty print, minify, and validate JSON instantly in your browser
Quick Guide
- Format — pretty prints with 2-space indentation
- Minify — strips all whitespace
- Validate — checks syntax without modifying
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. JSON is used in APIs, config files, databases, and almost every modern web application.
Why Format JSON?
Minified JSON removes all whitespace to reduce file size — useful for APIs and storage. Pretty-printed JSON adds indentation to make it human-readable — essential for debugging.
Common JSON Errors
- Trailing commas: {"a": 1,}
- Single quotes instead of double: {'key': 'value'}
- Unquoted keys: {key: "value"}
- Missing commas between properties