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Font Format

A font format is the technical container for typographic data – the specific digital file structure needed to realize a typeface. An artistic letter design must be encoded into one of these formats before it can be used in any software.

Four bordered cards, each showing “Aa” in heavy black above a file format label — .TTF and .OTF in grey-bordered cards on the top row, .WOFF and .WOFF2 in blue-bordered cards below — the four formats one typeface is commonly delivered in.

Serving as the technical container for typographic data, a font format represents the specific digital file structure required to realize a typeface, which means an artistic letter design must first be encoded into one of these formats before it can be actively utilized in any software environment.

The universally accepted benchmark for this technology is OpenType, which splits into two primary underlying structural subformats: TrueType, identifiable by its dot-ttf file extension, and the Compact Font Format, which uses the dot-otf extension. Both of these variations possess the capability to house variable font data, though for the Compact Font Format, this functionality is restricted exclusively to its second version. For digital publishing and online deployment, either file type can be converted without any degradation of data quality into dedicated web formats like the Web Open Font Format or its more highly compressed successor, WOFF2. These specialised web containers enjoy comprehensive compatibility across modern internet browser applications, making them the standard choice for online text rendering.

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About the author
Iveta Stoyanova

Iveta is the Social Media & Community Manager at Fontfabric. With a background in Rhetoric & Speech Communication, she writes about the human side of typography, the inspiration behind new typefaces, choosing the right font for your project, and font licensing.