TTF2VOLT(1) User Contributed Perl Documentation TTF2VOLT(1)

# [NAME](#NAME)

ttf2volt - create VOLT project from existing OpenType font file

# [SYNOPSIS](#SYNOPSIS)

```
  ttf2volt [options] infontfile [outfontfile]
```

Creates a VOLT project from an existing OpenType font file.

# [OPTIONS](#OPTIONS)

```
  -a        allow non-adobe glyph names
  -g n      group creation threshold
  -l file   emit log messages to named file
  -r        retain GPOS, GSUB, and GDEF tables in output font
  -s        do not send warnings to stdout (will still go to log)
  -t file   name of replacement VOLT tags file if needed.
  -v file   Volt project source (.vtp) file to create
```

# [DESCRIPTION](#DESCRIPTION)

Attempts to create a VOLT project from an existing OpenType font by reading and interpreting the existing GDEF, GPOS, and GSUB tables. Not every OpenType rule can be mimiced in VOLT; warnings are issued when ttf2volt cannot handle something.

In normal usage, specify either outfontfile (to create a font ready to be opened by VOLT) and/or the -v option (to create a VOLT project source that can be imported into the font).

The group creation threshold option sets the minimum number of glyphs that ttf2volt will put into a group for the purposes of building a lookup.

Lookups currently supported (type\[.format]):

GSUB: 1 2 3 4 6.3 GPOS 1 2 3 4 5 8.3

# [AUTHOR](#AUTHOR)

Martin Hosken <http://scripts.sil.org/FontUtils>. (see CONTRIBUTORS for other authors).

# [LICENSING](#LICENSING)

Copyright (c) 1998-2016, SIL International (http://www.sil.org)

This script is released under the terms of the Artistic License 2.0. For details, see the full text of the license in the file LICENSE..

2026-10-03 perl v5.44.0

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Document: ttf2volt(1) from perl-font-ttf-scripts 1.06-r0 (Chainguard OS)