synthesia.io draws its headings and body text in Basier Square. It uses 2 fonts in all. We measured it on October 21, 2026.
The fonts synthesia.io draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Basier Square | Headings, Body text | 22.5% | Not verified as obtainable | – |
| Inter | Smaller text | 2.4% | Open source | 71 of 407 sites (rank 1) |
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?
- Basier Square: we could not verify that this typeface can be licensed, so we neither recommend it nor link a source.
- Inter is open source and free to use, including commercially. Get it from Google Fonts.
synthesia.io among ai sites
synthesia.io is one of the 31 ai sites we measured. Across them, Inter is the most used font you can get, on 3 of the 31 (10%). All the fonts ai sites use.
What pairing does synthesia.io use?
synthesia.io uses one family, Basier Square, for both headings and body text. So do 280 of the 407 sites we analyzed (69%). Pairings of two different fonts.
Other ai sites we measured
- elevenlabs.io Inter, Geist Mono, KMR Waldenburg Buch
- mistral.ai ALT Mistral, Inter
- anthropic.com Anthropic Sans Text, Anthropic Serif Text
- bolt.new Schibsted Grotesk
- character.ai Open Sans, At Hauss
- cursor.com Cursor Gothic, Berkeley Mono, EB Garamond
See the fonts on all 407 sites.
FAQ
What font does synthesia.io use?
synthesia.io draws its headings and body text in Basier Square. It uses 2 fonts in all: Basier Square, Inter. We measured it on October 21, 2026.
Is Basier Square free?
We could not verify that Basier Square can be licensed, so we do not state a licence.
What font pairing does synthesia.io use?
One family, Basier Square, for both headings and body text.
Can I use the same fonts as synthesia.io 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 synthesia.io. Each font's licence is on this page, from its source.
How do you know which font synthesia.io uses?
We opened synthesia.io 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.