Format family
Font format family — TTF, OTF, WOFF & WOFF2
Font files are another format family: installable desktop fonts versus compressed web fonts. Convert between them when a site build or design tool expects a different container.
Desktop fonts
Design and OS install formats.
TTF fonts install on Windows and macOS for documents and design. For the web, prefer WOFF2. Always check the font license before converting or embedding.
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OTF supports rich typographic features (ligatures, alternates) used in professional design. Use OTF/TTF on the desktop; serve WOFF2 on websites when licensing allows.
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Web fonts
Compressed delivery for CSS @font-face.
WOFF wraps TTF/OTF data with compression for CSS @font-face. Prefer WOFF2 today for smaller files, but WOFF remains a useful fallback in some pipelines.
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WOFF2 typically yields the smallest web fonts and is supported by all modern browsers. Convert licensed TTF/OTF sources to WOFF2 for production CSS.
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Best for…
Decision guides for this family — not generic productivity tips.