TrueType

font

Created by Apple, TrueType Font files are a sequence of concatenated tables (a table is a sequence of words; each table must be long aligned and padded with zeroes if necessary). The first of the tables is the font directory, a special table that facilitates access to the other tables in the font. The directory is followed by a sequence of tables containing the font data. These tables can appear in any order. Certain tables are required for all fonts. Others are optional depending upon the functionality expected of a particular font. The tables have names known as tags. Tags have the type uint32. Currently defined tag names consist of four characters. Tag names with less than four characters have trailing spaces. When tag names are shown in text they are enclosed in straight quotes. Tables that are required must appear in any valid TrueType font file. Also notable is that Apple makes a distinction between a "TrueType font" (which refers to a particular font outline definition technology) and an "sfnt-housed font," which refers to any font which uses the same packaging format as a TrueType font: that is, it uses the same directory structure and the same table format and meaning for any tables present.

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Open it

• Apache TikaOpen sourcereads · Apache Software License 2.0
• ConverseenOpen sourcereads · GNU General Public License, version 3.0
• ExifToolOpen sourcereads · Artistic License / GNU General Public License, version 1.0 or later
• Glyphr StudioOpen sourcereads · GNU General Public License, version 3.0
• Ogre3dOpen sourcereads · MIT License
• PhotoRecOpen sourcereads · GNU General Public License
• Q1326617Open sourcereads · BSD licenses / GNU General Public License
• Q687332Open sourcereads · 3-clause BSD License / BSD licenses / GNU General Public License
• ACD FotoCanvas Litereads
• ACDSee 5reads
• diffoscopereads
• IrfanViewreads · freeware
• Photopeareads

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Documentation

• kaitai grammar: https://github.com/kaitai-io/kaitai_struct_formats/blob/master/font/ttf.ksy

Sources

• File Formats Wiki
• Kaitai Struct: ttf
• PRONOM x-fmt/453
• Wikidata Q751800
• File Formats Wiki

From Just Solve the File Format Problem (File Formats Wiki), Kaitai Struct format gallery, PRONOM, Wikidata. Updated 2026-10-24.

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