rubygems.org draws its headings and body text in Titillium. That is the only custom font on the page. We measured it on November 4, 2026.
The fonts rubygems.org draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Titillium | Headings, Body text | 100% | 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?
- Titillium: we could not verify that this typeface can be licensed, so we neither recommend it nor link a source.
rubygems.org among developer tools and infrastructure sites
rubygems.org is one of the 89 developer tools and infrastructure sites we measured. Across them, Inter is the most used font you can get, on 31 of the 89 (35%). All the fonts developer tools and infrastructure sites use.
What pairing does rubygems.org use?
rubygems.org uses one family, Titillium, for both headings and body text. So do 567 of the 845 sites we analyzed (67%). Pairings of two different fonts.
Other developer tools and infrastructure sites we measured
- akamai.com Instrument Sans
- algolia.com Sora, Inter
- angular.dev Inter, DM Mono
- ansible.com Red Hat
- ant.design Alibaba Sans
- astro.build Obviously, Inter, MD IO
See the fonts on all 845 sites.
FAQ
What font does rubygems.org use?
rubygems.org draws its headings and body text in Titillium. We measured it on November 4, 2026.
Is Titillium free?
We could not verify that Titillium can be licensed, so we do not state a licence.
What font pairing does rubygems.org use?
One family, Titillium, for both headings and body text.
Can I use the same fonts as rubygems.org 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 rubygems.org. Each font's licence is on this page, from its source.
How do you know which font rubygems.org uses?
We opened rubygems.org 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.