IBM Plex Serif
Type with Purpose
Good typography guides attention, improves understanding, and makes communication effortless.
The Anatomy of a Typeface
By FontSide · June 2026
Every typeface is a system of decisions — about stroke contrast, x-height, spacing, and rhythm. The best ones feel invisible: you stop seeing the letters and start hearing the voice behind them. That transparency is the hardest thing to design.
A high x-height opens up the counters and makes small text breathe. Tight tracking pulls a headline together; loose tracking gives a caption room to exhale. None of these choices are accidents — they are arguments about how reading should feel.
Uppercase
Lowercase
Numerals
Symbols
Configuration
Select the weights and styles you want to include in your project.
Weights
Styles
Package Manager
The recommended way to use fonts in modern web projects.
1. Install Package
pnpm add @fontsource/ibm-plex-serif2. Import in App
// Please select at least one weight and style3. CSS Usage
body {
font-family: "IBM Plex Serif", serif;
}Google Fonts CDN
Use Google's CDN to embed the fonts directly via HTML.
HTML <head>
<!-- Please select at least one weight and style -->Fontsource CDN
Skip the build step by adding this directly to your global CSS file.
Global CSS
/* Please select at least one weight and style */Background & Story
IBM Plex® is the corporate typeface for IBM worldwide and an open-source project developed by the IBM Brand & Experience team (BX&D). Plex is an international typeface family designed to capture IBM’s brand spirit and history and to illustrate the unique relationship between mankind and machine—a principal theme for IBM since the turn of the century. The result is a neutral yet friendly Grotesque style typeface that balances design with the engineered details that make Plex distinctly IBM. The family includes a Sans, Sans Condensed, Mono, and Serif and has excellent legibility in print, web, and mobile interfaces.
Plex’s three designs work well independently and even better together. Use the Sans as a contemporary compadre, the Serif for editorial storytelling, or the Mono to show code snippets. The unexpectedly expressive nature of the italics gives you even more options for your designs. Currently, IBM Plex Sans supports Extended Latin, Arabic, Cyrillic, Devanagari, Greek, Hebrew, Japanese, Korean and Thai.
Tags & Moods
Subsets
Install
pnpm add @fontsource/ibm-plex-serifDesigned by
Mike Abbink, Bold Monday
Links
License
OFL-1.1