{ }
No signupJSON Formatter
Format, validate, and minify JSON with syntax highlighting.
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JSON Beautifier
Beautify messy or minified JSON with proper indentation and syntax highlighting.
json-formatter.tool
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Formatted result will appear hereNothing you paste here is ever sent to a server - it all happens locally in your browser.
What is a json beautifier?
A JSON beautifier takes cramped, single-line JSON and reformats it with consistent indentation and line breaks so a human can actually read it - the same job as a JSON formatter, with the emphasis on visual readability. This one adds proper indentation of your choice, syntax highlighting, and catches syntax errors along the way.
How to use this tool
- 1Paste your minified or messy JSON into the input box.
- 2Choose an indent width - 2 spaces, 4 spaces, or tabs.
- 3Click Format to beautify it instantly, with color-coded keys, strings, numbers, and booleans.
- 4Copy the beautified result or download it as a .json file.
Common use cases
Making a single-line API response readable before debugging it
Cleaning up JSON pasted from a Slack message or terminal output
Preparing JSON for a blog post, documentation, or code review
Quickly eyeballing the structure of a deeply nested object
Good to know
Frequently asked questions
What's the difference between a beautifier and a formatter?
Functionally, nothing on this site - both terms describe the same job of adding readable indentation to JSON. This page exists because people search for both terms, but the tool underneath is identical to the JSON Formatter.
Can I control the indent size?
Yes - choose 2 spaces, 4 spaces, or tabs, and the beautified output updates immediately.
What happens if the JSON has a syntax error?
You'll see the exact line and column where parsing failed, instead of a blank or garbled result - so you can fix the actual problem instead of guessing.
Is my JSON uploaded anywhere?
No - beautifying happens entirely in your browser, whether you paste the JSON or upload a file.
quick_facts.json
{
"runs_in_browser": true,
"data_sent_to_server": false,
"signup_required": false,
"price": "free",
"category": "JSON Tools"
}