Embedded vs referenced fonts in PDFs

A PDF is supposed to look identical everywhere — but if fonts are not embedded, a reader substitutes them and your careful layout shifts.

Embedded fonts travel with the file

When a font is embedded, the glyphs are stored inside the PDF. Anyone opening it sees your exact typeface, spacing and layout, even if they have never installed that font.

Referenced fonts rely on the reader

If a font is only named, the reader picks the closest available substitute. Widths differ, lines rewrap, and the design drifts. This is the classic cause of "the PDF looks wrong on their computer."

Subsetting keeps files small

Most tools embed only the characters you actually used — a subset — so embedding rarely bloats the file. It is almost always worth it for anything you send to someone else.