python.org draws its headings in Flux and its body text in Source Sans 3. It uses 2 fonts in all. We measured it on October 21, 2026.
The fonts python.org draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Source Sans 3 | Body text | 92% | Open source | 9 of 407 sites (rank 4) |
| Flux | Headings | 8% | 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?
- Source Sans 3 is open source and free to use, including commercially. Get it from Google Fonts.
- Flux: we could not verify that this typeface can be licensed, so we neither recommend it nor link a source.
python.org among developer tools and infrastructure sites
python.org is one of the 62 developer tools and infrastructure sites we measured. Across them, Inter is the most used font you can get, on 25 of the 62 (40%). All the fonts developer tools and infrastructure sites use.
What pairing does python.org use?
Flux for headings with Source Sans 3 for body text does not repeat on another analyzed site, so there is no shared pairing to show. Pairings that do repeat.
Other developer tools and infrastructure sites we measured
- algolia.com Sora, Inter
- angular.dev Inter, DM Mono
- astro.build Obviously, Inter, MD IO
- auth0.com Aeonik, Aeonik Mono
- aws.amazon.com Amazon Ember, Amazon Ember Mono
- bun.sh Martian Mono, Archivo
See the fonts on all 407 sites.
FAQ
What font does python.org use?
python.org draws its headings in Flux and its body text in Source Sans 3. It uses 2 fonts in all: Source Sans 3, Flux. We measured it on October 21, 2026.
Is Flux free?
We could not verify that Flux can be licensed, so we do not state a licence.
What font pairing does python.org use?
Flux for headings and Source Sans 3 for body text. It does not repeat on another analyzed site.
Can I use the same fonts as python.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 python.org. Each font's licence is on this page, from its source.
How do you know which font python.org uses?
We opened python.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.