Does formatting alter any data values?

No. JSON formatting only modifies whitespace, indentation, and line breaks. Key-value structures, arrays, and primitive data values remain 100% untouched.

Are comments allowed in standard JSON?

No. RFC 8259 standard JSON does not support comments (like // or /* */). All keys must strictly use double quotes.

JSON Formatter

Try the free JSON Formatter tool in the Data category provided by WebToolBox right in your browser. Process your tasks quickly and securely without any installation.

Settings

Input

Output

What is JSON Formatter & Validator?

JSON (JavaScript Object Notation, RFC 8259) is the ubiquitous lightweight, human-readable standard format for structured data exchange across modern APIs, cloud services, and databases.

A JSON Formatter cleans up unformatted or minified JSON strings, applying standardized 2-space or 4-space indentation, line breaks, and bracket hierarchy so developers can inspect and debug data effortlessly.

It also features a built-in strict validator that pinpoints syntax issues such as trailing commas, single quotes, unquoted keys, or mismatched brackets.

How to Use

Paste your raw, minified, or messy JSON into the input area.
Select your preferred formatting mode ('Pretty' or 'Compact/Minify').
The formatted and validated JSON is generated automatically in real time.
Click 'Copy' to store the clean JSON in your clipboard.

FAQ

Does formatting alter any data values?: No. JSON formatting only modifies whitespace, indentation, and line breaks. Key-value structures, arrays, and primitive data values remain 100% untouched.
Are comments allowed in standard JSON?: No. RFC 8259 standard JSON does not support comments (like // or /* */). All keys must strictly use double quotes.

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