chartjs.org draws its headings and body text in Proxima Nova. That is the only custom font on the page. We measured it on November 4, 2026.
The fonts chartjs.org draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Proxima Nova | Headings, Body text | 100% | Commercial | 24 of 845 sites (rank 4) |
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?
- Proxima Nova is sold under a commercial licence by Mark Simonson Studio. Licence it from Mark Simonson Studio; copying the file from a site that uses it is not a licence.
Free fonts in a similar style
If you cannot license Proxima Nova, these free fonts are in the same style (sans serif) and real sites use them: Inter (126 sites), Roboto (43 sites), Open Sans (26 sites), Geist (18 sites). A similar style is not the same typeface, so compare them side by side before you commit.
chartjs.org among developer tools and infrastructure sites
chartjs.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 chartjs.org use?
chartjs.org uses one family, Proxima Nova, 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 chartjs.org use?
chartjs.org draws its headings and body text in Proxima Nova. We measured it on November 4, 2026.
Is Proxima Nova free?
No. Proxima Nova is sold under a commercial licence by Mark Simonson Studio.
What font pairing does chartjs.org use?
One family, Proxima Nova, for both headings and body text.
Can I use the same fonts as chartjs.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 chartjs.org. Each font's licence is on this page, from its source.
How do you know which font chartjs.org uses?
We opened chartjs.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.