Font Tools

fontTools – library to manipulate font files from Python

fontTools is a library for manipulating fonts, written in Python. It’s an indispensable tool for font developers and font tool developers who need to deal with the finer details of TrueType and OpenType fonts, or anyone needing to create or process fonts beyond font editor capabilities.

The project includes the TTX tool, that can convert TrueType and OpenType fonts to and from an XML text format, which is also called TTX. It supports TrueType, OpenType, AFM and to an extent Type 1 and some Mac-specific formats.

The software is released under an open source license.

Features include:

  • TTX — From OpenType To XML And Back. This tool lets users convert binary font files (.otf, .ttf, etc) to the TTX XML format, edit them, and convert them back to binary format:
    • If an input file is a TrueType or OpenType font file, it will be decompiled to a TTX file (an XML-based text format).
    • If an input file is a TTX file, it will be compiled to whatever  format the data is in, a TrueType or OpenType/CFF font file.
    • Option to allow virtual glyphs ID’s on compile or decompile.
    • Split tables – save the TTX data into separate TTX files per table and write one small TTX file that contains references to the individual table dumps. This file can be used as input to ttx, as long as the table files are in the same directory.
    • Split glyf table: Save the glyf data into separate TTX files per glyph and write a small TTX for the glyf table which contains references to the individual TTGlyph elements.
    • Specify the folder where the output files are created.
    • Specify which tables to dump or which tables to exclude.
    • Merge partial .ttx files with existing .ttf or .otf files.
    • List brief table info instead of dumping to .ttx.
    • Split tables to separate .ttx files.
    • Disable TrueType instruction disassembly.
    • Supports the following tables: BASE, CBDT, CBLC, CFF, CFF2, COLR, CPAL, DSIG, EBDT, EBLC, FFTM, Feat, GDEF, GMAP, GPKG, GPOS, GSUB, Glat, Gloc, HVAR, JSTF, LTSH, MATH, META, MVAR, OS/2, SING, STAT, SVG, Silf, Sill, TSI0, TSI1, TSI2, TSI3, TSI5, TSIB, TSID, TSIJ, TSIP, TSIS, TSIV, TTFA, VDMX, VORG, VVAR, ankr, avar, bsln, cidg, cmap, cvar, cvt, feat, fpgm, fvar, gasp, gcid, glyf, gvar, hdmx, head, hhea, hmtx, kern, lcar, loca, ltag, maxp, meta, mort, morx, name, opbd, post, prep, prop, sbix, trak, vhea, and vmtx.
  • Other tools:
    • pyftinspect – inspect fonts.
    • pyftmerge – merge fonts.
    • pyftsubset – subset fonts.

FontTools requires Python 2.7, 3.4 or later.

Support: Forum
Developer: Many contributors
License: MIT License

fontTools is written in Python. Learn Python with our recommended free books and free tutorials.

Return to Font Tools | Return to Font Editors

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