Free CSS to SASS Converter Online
Convert CSS to SASS indented syntax instantly in your browser. No install needed — paste your CSS and get clean SASS output in seconds.
Input CSS
Converted SASS
Example
Here's a quick before-and-after to show what this tool does. Drop in some CSS on the left and watch it convert to SASS indented syntax on the right — no curly braces, no semicolons.
CSS → SASS Conversion
Input CSS:
Converted SASS (indented syntax):
Click Sample to load the example above into the editor and see the conversion live. You can also upload a .css file directly.
What Is CSS to SASS Conversion?
SASS (Syntactically Awesome Style Sheets) is the original CSS preprocessor — it predates SCSS and uses an indented syntax that's clean and whitespace-significant, similar to Python or Pug. Instead of curly braces and semicolons, SASS uses indentation to define structure. This tool converts standard CSS into that indented SASS format.
SASS indented syntax is still used in many projects, especially older codebases. If you're migrating a stylesheet, or you just prefer the cleaner look of indented syntax over SCSS, this converter handles the mechanical part instantly. Learn more about the difference between SASS indented syntax and SCSS in the official docs.
How to Use
Paste or Upload Your CSS
Paste your CSS directly into the left editor, or click Upload to load a .css file from your computer. You can also click Sample to load an example.
Conversion Happens Automatically
As you type or paste, the tool converts your CSS to SASS indented syntax in real time. Curly braces are removed, semicolons are stripped, and indentation takes over.
Copy or Download the Result
Click Copy to grab the output, or Download to save it as a .sass file. Drop it into your project and you're done.
When Does This Help?
This converter is handy when you're migrating a plain CSS file to a SASS-based project, or when you want to refactor a stylesheet without doing the tedious manual conversion of removing every ; and {}. It's also great for learning how SASS indented syntax works compared to plain CSS.
Keep in mind: the converter does a flat conversion — it doesn't automatically nest selectors like .parent .child into deeply nested SASS. That kind of restructuring requires understanding your CSS architecture. But for the syntax transformation itself — stripping braces and semicolons — this tool does the job cleanly. If you want nesting, try the CSS to SCSS converter which builds a nested tree.
FAQ
What's the difference between SASS and SCSS?
SASS (indented syntax) and SCSS are both syntaxes of the Sass preprocessor. SCSS looks like regular CSS — it uses curly braces and semicolons. SASS uses indentation instead, with no braces or semicolons. Both compile to the same CSS. SCSS is more popular today, but SASS indented syntax is still used in many projects.
Does this tool nest selectors automatically?
No — this is a flat conversion. A rule like .parent .child { ... } becomes .parent .child in SASS indented syntax, not a nested block. If you want automatic nesting, try the CSS to SCSS converter which builds a nested selector tree.
Can I use the converted SASS file directly in my project?
Yes — save it as a .sass file and your SASS compiler (like the Sass CLI or a build tool like webpack or Vite) will compile it to CSS just like SCSS. Make sure your build config is set up to handle .sass files.
What happens to CSS comments?
Block comments (/* ... */) and single-line comments (// ...) are stripped during conversion. If you need to preserve comments, you can add them back manually after converting. SASS supports both comment styles natively.
Does this work with CSS variables and calc()?
Yes — CSS custom properties (variables) and functions like calc(), clamp(), and var() pass through unchanged. The converter only touches the structural syntax, not the property values.
Is my CSS processed on the server?
No — everything runs entirely in your browser using JavaScript. Your CSS is never sent to any server. This makes the tool fast and private — safe to use with internal or proprietary stylesheets.
Related Tools
Need to go the other direction, or work with a different preprocessor? Check out the SCSS to CSS converter, the CSS to Less converter, or browse all CSS tools above.