CSS nesting is a native CSS syntax that allows child selectors to be written inside parent selectors, similar to SCSS nesting. For example, .card { h2 { color: red; } } is equivalent to .card h2 { color: red; }. CSS nesting became a standard in 2023 and is widely supported by modern browsers.
CSS nesting is supported by Chrome 120+, Firefox 117+, and Safari 17.2+. For projects that need to support older browsers, you can use this tool to flatten nested CSS into a compatible format.
Native CSS nesting does not require a preprocessor and runs directly in the browser. Syntactically, CSS nesting uses the ampersand symbol to reference the parent selector (similar to SCSS), but it is required in some cases (like pseudo-elements and pseudo-classes). SCSS requires a compilation step, while native CSS nesting does not.
No. All CSS conversion is done locally in your browser. No data is sent to any server.
No. The converter preserves all CSS rules and properties, only changing how selectors are organized. When converting from flat to nested, it intelligently identifies selectors with shared prefixes for grouping.