What is source-sans?

Source Sans Pro is a family of sans-serif fonts created by Adobe and designed specifically for use in software interfaces. Sans-serif means the letters have clean, plain strokes without the small decorative feet you see in fonts like Times New Roman. That makes it well-suited for screens, menus, buttons, and other interface text where readability at small sizes matters. This repository holds the source files for the font, not just the finished font files themselves. Adobe has made the entire typeface open source, so anyone can download the ready-to-use font files from the releases section, or build their own version from scratch using the source. The README is mostly build instructions for type designers or developers who want to compile the fonts themselves. The process requires a tool called AFDKO (Adobe Font Development Kit for OpenType). Once installed, you can build individual font weights or run a single script to generate all variants at once, including both the traditional fixed-weight formats (OTF and TTF) and variable fonts. Variable fonts are a newer format that stores multiple weights and widths in a single file, letting browsers and apps smoothly interpolate between them. For most people, downloading the pre-built font files from the releases page is the right approach. The source-build workflow is relevant if you need to modify the typeface, contribute corrections, or understand how professional type design and font compilation work. The font was designed by Paul D. Hunt at Adobe. Bug reports and suggestions can be sent through GitHub issues or directly to the designer.