CSS Nesting Converter Online Free — Convert Flat CSS to Native Nesting Syntax

Flat CSS Input

Nested CSS Output

Browser Support (2026):

✅ Chrome 120+ · ✅ Firefox 117+ · ✅ Safari 17.2+ · ✅ Edge 120+

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How to Use

Paste your flat CSS or SCSS code into the input editor
Choose conversion direction: flat to nested or nested to flat
Click "Convert" to transform the CSS
Copy the converted CSS code and check browser compatibility notes

Use Cases

Migrating from SCSS/SASS to native CSS nesting
Converting flat CSS to nested syntax for better readability
Learning native CSS nesting syntax from existing stylesheets
Checking if your CSS nesting is compatible with target browsers

Frequently Asked Questions

Is CSS nesting supported in all browsers in 2026?

Yes! As of 2026, native CSS nesting is supported in all major browsers including Chrome 120+, Firefox 117+, Safari 17.2+, and Edge 120+. It's safe to use in production.

What is the difference between SCSS and CSS nesting?

Native CSS nesting requires the & symbol for element selectors (e.g., & span {}), while SCSS allows implicit nesting. The converter handles this difference automatically.

Should I still use SCSS?

Native CSS nesting covers most nesting use cases. However, SCSS still offers variables ($vars), mixins, functions, and loops that native CSS doesn't have (though CSS custom properties replace variables).