Source Serif 4 / Free Font Family

Source Serif 4 is Adobe's open-source text serif, featuring a clean, transitional structure tuned for extended reading. Weight and optical-size axes plus a broad Latin, Cyrillic, and Greek character set make it a workhorse for multilingual documents and interfaces.

The family works well for editorial body text, technical documentation, e-books, long-form web copy, reports, UI text, academic layouts, captions, and multilingual publications.

Included:

• variable across weight (Extra Light to Black) and optical size, with italics;
• uppercase and lowercase letters;
• numbers, punctuation, and symbols;
• multilingual support across extended Latin, Cyrillic, and Greek scripts;
• ligatures and OpenType features, including small caps and old-style figures.