The stylesheet language that controls the presentation of web pages.
Quick facts
What is CSS
The stylesheet language that controls the presentation of web pages.
GitHub Linguist classifies CSS as a markup language, typically using extensions such as .css.
File extensions:
Related extensions
Related languages
Frequently asked questions
The stylesheet language that controls the presentation of web pages.
Common extensions include .css.
Sources & standards
Updated 2026-08-18
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