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What is it
A font format developed by Apple and Microsoft in the late 1980s as a free alternative to Adobe's PostScript fonts. TrueType fonts contain quadratic Bezier outline data for rendering text at any size, plus hinting instructions that optimise readability at small sizes on low-resolution screens. TTF is still everywhere — most system fonts on Windows and macOS are TrueType. OpenType (OTF) is the modern successor with more typographic features, and WOFF2 is the web-optimised wrapper, but TTF remains the most widely supported font format across operating systems and applications.
Technical details
Safety
What opens it
OS font viewer (double-click)
FontForge
Glyphs
FAQ
What's the difference between TTF and OTF?
OTF (OpenType) is the newer standard with more advanced typographic features like ligatures and stylistic alternates. OTF uses cubic Bezier curves (smoother outlines), while TTF uses quadratic. For everyday use, both work fine everywhere.
Can I use TTF fonts on websites?
Technically yes, but you should not. TTF files are uncompressed and slow to download. Convert to WOFF2 for web use — it is the same font data compressed to about half the size. Use TTF for desktop applications and local installs.
Related formats