Beautify CSS, JS and HTML Online Free
Paste compressed, minified, or poorly formatted CSS, JavaScript, or HTML and instantly produce a clean, readable version with proper indentation and line breaks. All processing runs in your browser — no uploads, no account.
✓ Free developer tool✓ No account required✓ Browser-based utility✓ Fast results✓ Mobile friendly
Minified Input
This tool runs in your browser and does not upload your data to BuBird servers.
How To Use
How to Use Beautify CSS / JS / HTML
1
Select the Code Type
Choose CSS, JavaScript, or HTML from the selector in the tool.
2
Paste Your Code
Paste the minified, compressed, or unformatted code into the input area.
3
Beautify
Click Beautify to produce a formatted output with consistent indentation, line breaks, and structure.
4
Copy the Result
Copy the formatted code into your editor, project, or documentation.
Example
Example Use
Reading a Third-Party Library's Source
You want to inspect the CSS from a third-party UI component library to understand how a particular class is structured. The distributed file is minified into a single line. Paste it into the beautifier, select CSS, and the output expands each rule onto its own line — making selectors, properties, and values easy to read and copy.
Use Cases
Who Uses Beautify CSS / JS / HTML
Developers
Format minified third-party scripts and stylesheets to understand their structure and debug issues.
Frontend Developers
Reformat auto-generated or compressed CSS from design tools into readable, editable code.
QA Engineers
Read minified HTML output from server-rendered pages to identify structure and locate elements.
Technical Writers
Format code samples extracted from minified sources for use in documentation and tutorials.
Full-Stack Developers
Inspect and understand generated code from frameworks and build tools during debugging.
Students & Learners
Study how real-world libraries write CSS and JavaScript by formatting their minified distributions.
Related Tools
Related Developer Tools
FAQ
Frequently Asked Questions
What does the beautifier do to my code?
The beautifier adds line breaks and indentation to compressed or minified code, making it readable. It does not alter the logic, selectors, or behaviour of your code — only the formatting.
Can I use this to reverse minified code?
Yes. Pasting minified CSS, JS, or HTML produces a formatted, readable version. Note that if the code was also mangled during minification, original variable names may be shortened — the beautifier restores structure but not original names.
Is my code sent to a server?
No. All formatting runs locally in your browser. Your CSS, JavaScript, and HTML are never sent to BuBird servers.
What is the difference between beautify and minify?
Beautify adds whitespace and indentation to make code readable. Minify removes whitespace to reduce file size. They are opposite operations.
Can I format code from any framework or library?
Yes. The beautifier works with standard CSS, JavaScript (including ES6+), and HTML regardless of the framework that generated it — React, Vue, Angular, or plain vanilla code.