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Glossary

What is an embedded font?

Updated:

An embedded font is a font file (often only the glyphs used) stored inside a PDF or an EPUB, so the text displays the same on any device. In EPUB it is declared with @font-face in the CSS.

Why it matters when you convert a PDF to EPUB

PDF fonts are usually subsets with licences that may not allow re-use, and the reader's own fonts read better on an e-ink screen anyway. A converter normally leaves PDF fonts behind and keeps only emphasis (bold, italic) and structure, embedding a font only when a script needs it.

Related terms

EPUBCheck messages about this

  • CSS-007 Font-face reference "…" refers to non-standard font type "…".
  • PKG-026 Obfuscated resource must be a Font Core Media Type (was declared as "…" in "…").

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FAQ

What is an embedded font?

An embedded font is a font file (often only the glyphs used) stored inside a PDF or an EPUB, so the text displays the same on any device. In EPUB it is declared with @font-face in the CSS.