Source Sans 3 is a free sans serif typeface designed by Paul D. Hunt. It is used by 9 of the 407 sites we analyzed, which ranks it number 4 among the 100 website fonts you can get. You can use it without paying.
Source Sans 3 at a glance
- Rank
- 4 of 100, by number of analyzed sites using it
- Used on
- 9 sites of 407 analyzed (2%)
- Style
- Sans Serif
- Designer
- Paul D. Hunt
- Licence
- Free, open source
- Added to Google Fonts
- September 17, 2021
- Source
- Google Fonts, checked October 21, 2026
Where is Source Sans 3 used?
Source Sans 3 is the headline font on 5 and the body font on 9 of the 9 sites that use it. Where it is not the biggest font for a job, it draws a smaller share of the text, such as labels or buttons.
| Industry | Sites using it | Of analyzed sites in that industry |
|---|---|---|
| Education | 2 | 13% |
| Health and wellness | 2 | 13% |
| Nonprofit, government and reference | 2 | 18% |
| AI | 1 | 3% |
| Developer tools and infrastructure | 1 | 2% |
| Food and drink | 1 | 5% |
Which websites use Source Sans 3?
Each link opens the free font finder on that site.
- python.org Developer tools and infrastructure · body · 92% of its text
- huggingface.co AI · headings · body · 94.6% of its text
- allrecipes.com Food and drink · body · 88.3% of its text
- ro.co Health and wellness · body · 100% of its text
- webmd.com Health and wellness · headings · body · 100% of its text
- coursera.org Education · headings · body · 100% of its text
- stanford.edu Education · headings · body · 86.1% of its text
- usa.gov Nonprofit, government and reference · headings · body · 97.1% of its text
- greenpeace.org Nonprofit, government and reference · body · 92.3% of its text
What does Source Sans 3 pair with?
| Used together with | Sites | As |
|---|---|---|
| Copper Pot | 1 | heading and body |
| Flux | 1 | heading and body |
| Greenpeace Sans | 1 | heading and body |
A pairing here means two different typefaces that are the biggest font for different jobs on the same site. It shows what real sites do, which is a good starting point and not a rule. All pairings.
Where do I get Source Sans 3?
Source Sans 3 is open source and free to use, including commercially. Download it from Google Fonts.
Google Fonts · checked October 21, 2026.
How do we know?
Each site was opened twice in a real browser and Chrome was asked which font file drew each piece of text. We count a font for a site only if both runs saw it and it drew at least 2% of the site’s custom-font text. The full method.
Other sans serif fonts in the ranking
FAQ
Is Source Sans 3 free?
Yes. It is open source and free for commercial use, and available from Google Fonts.
Who designed Source Sans 3?
Source Sans 3 was designed by Paul D. Hunt. The source link on this page is where that is credited.
Which websites use Source Sans 3?
Of the 407 sites we analyzed, 9 sites draw text in Source Sans 3, including python.org, huggingface.co, allrecipes.com, ro.co, webmd.com, coursera.org. The list on this page links each one to the font finder.
What fonts pair well with Source Sans 3?
On the sites we analyzed, Source Sans 3 appears alongside Copper Pot (1 site), Flux (1 site), Greenpeace Sans (1 site). That shows what real sites do, not a rule.
How do you know which font a site uses?
We open each site in a real browser and ask Chrome which font file it used to draw each piece of text, so renamed and self-hosted fonts are named by the file itself. Each site was measured twice, and a font counts only if both runs saw it.