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WOFF

As explained in Tiny CSS Projects

WOFF is a web font file format designed to package compressed font data for delivery and use by web browsers.

WOFF (Web Open Font Format) packages compressed font data for web delivery and includes metadata such as copyright information. WOFF2 continues the format with greater compression. section 9.4.1

For web fonts, keep these practical distinctions in mind:

  • Prefer WOFF or WOFF2 for web use; older formats include TTF, OTF, EOT, and SVG. section 9.4.1
  • Load each required weight and style separately unless a variable font supplies multiple variations in one file. section 9.4.1
  • Use WOFF as a fallback when browser support or project guidance still requires more than WOFF2. section 9.4.1

A WOFF fallback in @font-face

A font declaration can list a local font first, then WOFF2 and WOFF files: the supplied Open Sans example uses this sequence for italic text and assigns the family, style, weight, and display behavior.

How Tiny CSS Projects covers it

How deep it goes
Defines compression, metadata, format choice, and font-variation handling, but does not detail the format’s internal binary structure.
Examples
Uses Open Sans declarations showing WOFF2 alongside a WOFF fallback for italic text.
What you can do after
Operate/configure web fonts by selecting WOFF formats and declaring them with @font-face.
How it connects
Connects WOFF with @font-face, WOFF2, variable fonts, font weights, and font styles.
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