What font does Hugging Face use?
The machine learning hub picks two open source workhorses and ships them itself. Everything you see on the home page can be reproduced for free.
Short answer: Hugging Face uses Source Sans 3, served under its older name Source Sans Pro, for all text and IBM Plex Mono for code. Both are open source and self-hosted on huggingface.co.
Source Sans 3
Self-hosted92.6%- CSS name
Source Sans Pro- Weights
- 400, 600, 700
- Sizes
- 20px · 18px · 16px · 14px · 13.4px · 12px
- Served from
- huggingface.co
IBM Plex Mono
Self-hosted7.4%- CSS name
IBM Plex Mono- Weights
- 400
- Sizes
- 15px
- Served from
- huggingface.co
Sizes, weights and spacing by role
These are computed values from the live page, which is what the Font Inspector panel shows when you click each element.
| Role | Font | Size | Weight | Line height | Letter spacing |
|---|---|---|---|---|---|
| Headline | Source Sans 3 | 48px | 700 | 1 | normal |
| Subheading | Source Sans 3 | 24px | 600 | 1.33 | normal |
| Body text | Source Sans 3 | 16px | 400 | 1.5 | normal |
| Navigation | Source Sans 3 | 16px | 400 | 1.5 | normal |
| Button | Source Sans 3 | 14px | 400 | 1.43 | normal |
The main font stack in the CSS:
font-family: "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";- File names such as
source-sans-pro-latin-400-normal.woff2follow the Fontsource package layout: the site installs its fonts from npm instead of linking to Google Fonts. - The 48px headline has a line height of exactly 1.
- Charter and the KaTeX math fonts are declared for model cards and papers but are not used on the home page.
Check any site yourself in one click.
Sites change their type without notice. Font Inspector shows the rendered font, size, weight and spacing of any text on huggingface.co or anywhere else, and lists every font on the page. Free, no account.
About the fonts, and whether you can use them
Source Sans 3
Adobe’s first open source typeface, designed by Paul D. Hunt. Google Fonts now lists it as Source Sans 3; the files here still carry the Source Sans Pro name.
Can you use it? Yes. Source Sans 3 is free under the SIL Open Font License, on Google Fonts and as a download.
On Google Fonts: Source Sans 3.
IBM Plex Mono
The monospaced member of IBM Plex, IBM’s open source corporate family, designed with Bold Monday. Used for code snippets and model identifiers.
Can you use it? Yes. IBM Plex is free under the SIL Open Font License, on Google Fonts.
On Google Fonts: IBM Plex Mono.
Finding a font does not license it. More in how to get a font you found, legally.
Get a similar look with a free font
This starter uses Source Sans 3, which is open source, with the sizes and spacing measured above. It is an approximation, not a copy of Hugging Face’s brand typeface.
/* Approximates the Hugging Face look with a free font */
body {
font-family: "Source Sans 3", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
h1 {
font-size: 3rem; /* 48px */
font-weight: 700;
line-height: 1;
}
p {
font-size: 1rem; /* 16px */
font-weight: 400;
line-height: 1.5;
}How we checked
We opened huggingface.co in Chrome on November 5, 2026 and read the computed styles of its visible text: the declared font stack, the font actually rendered, and how much of the page’s text each family sets. That is the same data the Font Inspector extension shows under Fonts on this page. We re-check these pages periodically, and the date above shows the last inspection.
Hugging Face and its typefaces are trademarks of their respective owners. Font Inspector is not affiliated with Hugging Face.
Questions & answers
What font does Hugging Face use on its website?
Hugging Face uses Source Sans 3, served under its older name Source Sans Pro, for all text and IBM Plex Mono for code. Both are open source and self-hosted on huggingface.co.
Can I use the Hugging Face font?
Yes. Source Sans 3 is free under the SIL Open Font License, on Google Fonts and as a download.
How can I check what font Hugging Face uses myself?
Open huggingface.co, then click any text with the Font Inspector extension, or right-click, choose Inspect and look at Rendered Fonts in the Computed tab. Sites change their typography, so checking the live page is the only way to be sure.
Slack
Salesforce Sans, Salesforce Avant Garde
WHAT FONT DOES IT USE?Anthropic
Anthropic Sans, Anthropic Serif, Anthropic Mono
WHAT FONT DOES IT USE?Tailwind CSS
Inter, IBM Plex Mono
WHAT FONT DOES IT USE?LEGO
Cera Pro
WHAT FONT DOES IT USE?eBay
Market Sans
WHAT FONT DOES IT USE?Perplexity
PPLX Sans