Unicode subsets for the Source Serif Pro typeface.

Usage no npm install needed!

<script type="module">
  import affectionatedoorSourceSerifSubsets from 'https://cdn.skypack.dev/@affectionatedoor/source-serif-subsets';


Source Serif Pro subsets

Unicode subsets for the Source Serif Pro typeface.


yarn add @affectionatedoor/source-serif-subsets

Import the CSS file (you need loaders for the CSS and font files):

import "@affectionatedoor/source-serif-subsets";
// or if you want to use the variable fonts:
import "@affectionatedoor/source-serif-subsets/variable.css";

Use the font files in CSS:

html {
  font-family: "Source Serif Pro", serif;
/* or if you want to use the variable fonts:  */
html {
  font-family: "Source Serif Variable", serif;


  • Latin: U+0000-00FF.
  • Latin Extended-A: U+0100-017F.
  • Greek: U+0370-03FF.
  • Cyrillic: U+0400-04FF.
  • Latin Extended-Additional: U+1E00-1EFF.
  • Rest middle: U+0180-036F, U+1D00-1DBF.
  • Rest: U+2000-1F916.

Note: In IE9-11, unicode-range subsets don't work as expected, because the browser downloads all the available font files.


Subsets are available for Regular, Italic, Bold, and BoldItalic. I may add more in the future. The variable font files have all the weights.

Usage with Gatsby

// gatsby-browser.js
import @affectionatedoor/source-serif-subsets

Important: Many of the subset files are small, and, as a result, Gatsby will try to inline them as base64 strings in the CSS. This will result into a huge CSS file. To go around that, you'll have to change the inline limit for Webpack:

// gatsby-node.js
exports.onCreateWebpackConfig = ({ actions, getConfig }) => {
  const config = getConfig();
  const fontRule = config.module.rules.find(rule =>
  // Set a very small limit of 3KB.
  fontRule.use[0].options.limit = 3000;

See the link above for more details.