github-markdown-css is a CSS stylesheet that replicates GitHub's Markdown styling.
The project solves the problem of applying GitHub's visual design to Markdown content rendered outside of GitHub's platform. It provides a minimal CSS file that styles HTML generated from Markdown, allowing developers to display user-generated or documentation Markdown with GitHub's familiar appearance. The stylesheet is generated programmatically rather than hand-written, ensuring consistency with GitHub's actual styling.
Developers should choose this tool when building applications that display Markdown and want it to match GitHub's visual style without building custom CSS. It suits projects that render Markdown via GitHub's own API or other Markdown parsers, and works particularly well when paired with syntax highlighting tools like starry-night for code blocks. The package includes seven theme variants covering light, dark, dark-dimmed, dark high-contrast, and colorblind-accessible versions, with the default theme automatically switching between light and dark based on system preferences. Implementation requires adding a markdown-body class to the container and setting an appropriate width, with GitHub's standard being 980px width and 45px padding on desktop.
The project is generated from a separate repository, meaning direct contributions to the CSS itself are not accepted here; changes must be made to the generation tool instead. The development workflow involves running a build command to update the stylesheet when needed. The tool is available through multiple distribution channels including npm, CDNJS, and manual download.
