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Generate custom icon webfonts from the comfort of the command line.
Ruby Python CSS

Gem Version Build Status Code Quality Bountysource

Font Custom

Icon fonts from the command line.

Generate cross-browser icon fonts and supporting files (@font-face CSS, etc.) from a collection of SVGs (example).



Requires Ruby 1.9.2+, FontForge with Python scripting.

# On Mac
brew install fontforge --with-python
brew install eot-utils
gem install fontcustom

# On Linux
sudo apt-get install fontforge
unzip -d sfnt2woff && cd sfnt2woff && make && sudo mv sfnt2woff /usr/local/bin/
gem install fontcustom

Quick Start

fontcustom compile my/vectors  # Compiles icons into `fontcustom/`
fontcustom watch my/vectors    # Compiles when vectors are changed/added/removed
fontcustom compile             # Uses options from `./fontcustom.yml` or `config/fontcustom.yml`
fontcustom config              # Generate a blank a config file
fontcustom help                # See all options


To manage settings between compiles, run fontcustom config to generate a config file. Inside, you'll find a list of all possible options. Each option is also available as a dash-case command line flag (e.g. --css-selector) that overrides the config file.

SVG Guidelines

  • All colors will be rendered identically. Watch out for white fills!
  • Use only solid colors. SVGs with transparency will be skipped.
  • For greater precision in curved icons, use fills instead strokes and try these solutions.
  • Activating autowidth trims horizontal white space from each glyph. This can be much easier than centering dozens of SVGs by hand.


For use with Compass and/or Rails

Set templates to include scss-rails to generate a SCSS partial with the compatible font-url() helper. You'll most likely also need to set preprocessor_path as the relative path from your compiled CSS to your output directory.

Save CSS and fonts to different locations

You can save generated fonts, CSS, and other files to different locations by using fontcustom.yml. Font Custom can also read input vectors and templates from different places.

Just edit the input and output YAML hashes and their corresponding keys.

Tweak font settings

By default, Font Custom assumes a square viewBox, 512 by 512, and 16 pica points. Change font_design_size, font_em, font_ascent, font_descent, and autowidth to suit your own needs.

Generate LESS, Stylus, and other text files

Custom templates give you the flexibility to generate just about anything you want with Font Custom's output data.

Any non-SVG file in your input directory (or input:templates directory if you set it in fontcustom.yml) will be available as a custom template to copy into the output directory after compilation. You just need to specify the file name under the templates hash.

Any embedded ruby in the templates will be processed, along with the following helpers:

  • font_name
  • font_face: FontSpring's Bulletproof @Font-Face Syntax
  • glyph_selectors: comma-separated list of all icon CSS selectors
  • glyphs: all selectors and their codepoint assignments (.icon-example:before { content: "\f103"; })
  • @options: a hash of options used during compilation
  • @manifest: a hash of options, generated file paths, code points, and just about everything else Font Custom knows.
  • @font_path: the path from CSS to font files (without an extension)
  • @font_path_alt: if preprocessor_path was set, this is the modified path

font_face accepts a hash that modifies the CSS url() function and the path of the font files (font_face(url: "font-url", path: @font_path_alt)).


Brought to you by @endtwist and @kaizau

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