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:
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Frequently asked questions
The stylesheet language that controls the presentation of web pages.
Common extensions include .css.
Sources & standards
Updated 2026-09-13
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This page provides original, human-reviewed information about programming languages such as CSS, the Programming Language Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
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