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The Bitter Pro Project

by Sol Matas

Bitter Pro is is the extended version based on Bitter Project.

People read and interact with text on screens more and more each day. What happens on screen ends up being more important than what comes out of the printer. With the accelerating popularity of electronic books, type designers are working hard to seek out the ideal designs for reading on screen.

Motivated by my love for the pixel I designed Bitter. A "contemporary" slab serif typeface for text, it is specially designed for comfortably reading on any computer or device. The robust design started from the austerity of the pixel grid, based on rational rather than emotional principles. It combines the large x-heights and legibility of the humanistic tradition with subtle characteristics in the characters that inject a certain rhythm to flowing texts.

Bitter has little variation in stroke weight and the Regular is thicker than a normal ‘Regular’ style for print design. This generates an intense color in paragraphs, accentuated by the serifs that are as thick as strokes with square terminals.

Each glyph is carefully designed with an excellent curve quality added to the first stage of the design, that was entirely made in a pixel grid. The typeface is balanced and manually spaced to use very few kerning pairs, especially important for web font use since most browsers do not currently support this feature.

Designed by Sol Matas


Copyright (c) 2011-2020, Sol Matas (, with Reserved Font Name "Bitter Pro". Copyright (c) Bitter Pro project Authors


This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is copied below, and is also available with a FAQ at:


Version 1.010

  • Google commissioned Sol Matas to do an extension weight of the Bitter font.
  • This is a mayor update. A new weight distribution across the variables was applied.
  • If you want to maintain the appearance of the text you can use the old version.
  • Bitter Pro has extended Latin support, Small caps, a wider set of figures and symbols, and extended Cyrillic support (GF Cyrillic Pro).