Code Beautifier (JSON / CSS)

About this tool

Auto-indent minified or messy code. JSON is pretty-printed and CSS is expanded with clean indentation. The tool detects which one you pasted.

Example

Input: a{color:red}

Output: a { color:red; }

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Paste your JSON or CSS into the input box.
2. Let the tool detect the format and beautify it automatically.
3. Review the indented result and copy it back into your project.
4. If needed, paste a different snippet and beautify that too.

Step by step, what happens

1. The tool looks at the pasted text and checks whether it looks like JSON or CSS.
2. It rewrites minified or messy formatting into a cleaner structure with line breaks and indentation.
3. JSON keys and values are spread out in a readable nested layout, while CSS rules, selectors, and declarations are separated onto tidy lines.
4. The formatted version appears right away so you can inspect it, edit it, or copy it.

Worked example

Here is what happens when you paste a cramped JSON snippet that is hard to read.

Input: {"name":"Ada","active":true,"roles":["admin","editor"]}

1. The tool detects that the input is JSON because it uses braces, quotes, and JSON-style values.
2. It expands the object into readable lines and indents the nested array.
3. You can then copy the prettified JSON into your config file or response payload.

Tips and common mistakes

• Paste only the JSON or CSS you want formatted. Extra text before or after the code can make detection fail.
• This tool is for formatting, not fixing invalid syntax, so a broken JSON or CSS snippet may not beautify correctly.
• If your CSS is heavily minified, the tool should still expand it into separate rules and declarations.
• When you are unsure which format you have, paste the snippet as-is and let the tool detect it for you.

Frequently asked questions