{ }

JSON Formatter & Validator

Paste JSON to format, validate, or minify it instantly. Runs entirely in your browser.

Input

Output

Formatted output will appear here

About this tool

Everything runs in your browser — no data is ever sent to a server. Paste any JSON and it's instantly validated. Use Format for readable output, Minify to strip whitespace for production.

JSON Formatter and Validator Online

Need to format raw JSON or debug compilation objects? Our JSON Formatter prettifies your code into readable indentation layouts. Processes data locally in your browser.

1. Paste Raw Code

Insert minified, unformatted JSON strings into the input box above. The syntax validator checks your structures automatically.

2. Export Clean Code

Click format to view cleanly colored key-value mappings. Copy your prettified syntax with a single click.

Common Syntax Rules of Valid JSON

Double Quotes: Both key strings and string values must be enclosed in double quotes (`"key": "value"`). Single quotes (`'`) are invalid.
No Trailing Commas: The last key-value property inside an object or array must not end with a trailing comma.
Matching Brackets: Ensure all opening curly braces `` and square brackets `[]` have matching closing pairs.

Frequently Asked Questions

Is my data safe when using this formatter?

Yes. Our formatter runs entirely client-side using JavaScript. None of your database configurations or raw data strings are sent to any server.

What does SyntaxError: Unexpected token mean?

This occurs when the parser encounters invalid characters (such as unescaped quote marks or missing commas) in the raw string.