Free online tool

JSON Formatter

Format, validate, minify, copy, and download JSON in your browser.

Indentation

Fix JSON

JSON data

Formatted JSON

Formatted JSON appears here.

Formatted JSON appears here.

What this tool does

Paste JSON into the formatter to validate it and turn compact data into readable output with your preferred indentation.

Use the basic fix option for common JSON mistakes like trailing commas, comments, smart quotes, and unquoted object keys.