si.edu draws its headings and body text in Indivisible. That is the only custom font on the page. We measured it on November 5, 2026.
The fonts si.edu draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Indivisible | Headings, Body text | 99.4% | Not verified as obtainable | – |
Share is how much of the page’s custom-font text each font draws. System fonts and icon fonts are never counted. 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.
Can I use the same fonts?
- Indivisible: we could not verify that this typeface can be licensed, so we neither recommend it nor link a source.
si.edu among nonprofit, government and reference sites
si.edu is one of the 37 nonprofit, government and reference sites we measured. Across them, Open Sans is the most used font you can get, on 6 of the 37 (16%). All the fonts nonprofit, government and reference sites use.
What pairing does si.edu use?
si.edu uses one family, Indivisible, for both headings and body text. So do 567 of the 845 sites we analyzed (67%). Pairings of two different fonts.
Other nonprofit, government and reference sites we measured
- arxiv.org IBM Plex Sans
- bl.uk Hind
- canada.ca Noto Sans, Lato
- cern.ch Roboto
- creativecommons.org DM Sans, DM Mono
- dictionary.com Figtree
See the fonts on all 845 sites.
FAQ
What font does si.edu use?
si.edu draws its headings and body text in Indivisible. We measured it on November 5, 2026.
Is Indivisible free?
We could not verify that Indivisible can be licensed, so we do not state a licence.
What font pairing does si.edu use?
One family, Indivisible, for both headings and body text.
Can I use the same fonts as si.edu on my own site?
Only if the licence allows it. Free and open-source fonts can be used freely. Commercial fonts need your own licence, even though you can see the file on si.edu. Each font's licence is on this page, from its source.
How do you know which font si.edu uses?
We opened si.edu in a real browser and asked Chrome which font file drew each piece of text, twice in separate sessions. A font counts only if both runs saw it and it drew at least 2% of the site's custom-font text.
Can I check a different website?
Yes. Paste its address into the free font finder.