JSON Formatter & Validator
Format, validate, and prettify your JSON data instantly. Catch errors before they become problems.
Invalid JSON
Valid JSON
Your JSON is properly formatted and valid.
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What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is commonly used for transmitting data between a server and web applications.
Our JSON Formatter & Validator helps you format, validate, and prettify JSON data. Whether you're debugging API responses, storing configuration files, or working with web services, our tool makes it easy to ensure your JSON is valid and properly formatted.
Features
Real-time JSON syntax checking
Color-coded output for easy reading
Copy formatted JSON instantly
Compress JSON for production
Pinpoint exact error locations
Keys, values, depth analysis
Common JSON Errors & How to Fix Them
Missing quotes around keys
Wrong: {name: "John"}
Correct: {"name": "John"}
Trailing commas
Wrong: {"name": "John",}
Correct: {"name": "John"}
Single quotes instead of double
Wrong: {'name': 'John'}
Correct: {"name": "John"}
Unquoted numbers in keys
Wrong: {123: "value"}
Correct: {"123": "value"}
Frequently Asked Questions
What is JSON formatting?
JSON formatting (pretty printing) converts minified JSON into a readable, indented format with proper spacing and line breaks. This makes it easier to read and debug.
What is JSON minification?
JSON minification removes all unnecessary whitespace, newlines, and indentation to create the most compact version possible. This is useful for production environments where file size matters.
Is my data secure?
Yes! All processing happens in your browser. Your JSON data is never sent to our servers, ensuring complete privacy and security.
Can I validate JSON from an API?
Our tool works with any JSON data. You can paste JSON from API responses, config files, database exports, or any other source.