Thai font · OFL

Thasadith

By Narongsak Chaiwong

Typography & Licensing Specialist, ThaiGraph · June 13, 2026

Information verified as of June 2026

What Thasadith is

Thasadith is a humanist Thai sans serif with rounded corners by Cadson Demak, released on Google Fonts in 2018 in two weights, each with a true italic, under the SIL Open Font License. It is a spin-off from Srisakdi, the Rattanakosin handwriting revival in the same release.

The origin story is unusually specific. Cadson Demak’s repository describes Thasadith as a thought experiment: what if Srisakdi had been born as an upright typeface during the hot metal type period? The design work consisted of translating that slanted 19th-century handwriting into formal letterforms that fit typesetting conditions — a conservative text face, in the foundry’s words, “inspired by an old style handwriting without the end tail flare.” The repository notes the family “accidentally became a new spin off” during Srisakdi’s development.

The italic closes the loop: it was drawn to take the font back to the slanted form the handwriting started from.

Character design and tone

Thasadith reads as a text sans with a manuscript memory — humanist skeletons, rounded corners, and proportions inherited from pen-written Thai rather than from geometry. Where Kanit is compass-and-ruler, Thasadith is a clerk’s hand standing up straight.

The rounded corners soften the page without tipping into the toy-like register of fully rounded faces. Because the letterforms were readjusted from handwriting for typesetting, counters stay open and the rhythm is even at paragraph length. The flicked tail flare of the parent Srisakdi is gone; what remains is the underlying ductus.

The italic deserves its own mention. It is a designed return to the family’s slanted source, not an afterthought, which makes Thasadith useful in editorial settings where Thai text needs genuine emphasis styles alongside Latin.

Weights and availability

Thasadith ships four styles: Regular (400), Italic, Bold (700), and Bold Italic — two weights, each with an italic companion. Subsets cover Latin, Latin Extended, Thai, and Vietnamese. It entered Google Fonts on 22 August 2018, the same day as Srisakdi.

Two weights is the honest limitation here. There is no Light, no Medium, no SemiBold — the 400-to-700 jump is the only hierarchy move available inside the family, so complex editorial systems will need a second face for intermediate levels.

How to download Thasadith

Thasadith is a free download from Google Fonts — the family ZIP contains all four TTF styles, no registration required. Three routes:

1. Google Fonts ZIP — open the Thasadith specimen, click “Get font”, and download the family.
2. CSS embed — load https://fonts.googleapis.com/css2?family=Thasadith:ital,wght@0,400;0,700;1,400;1,700&display=swap in a <link> tag, then set font-family: 'Thasadith', sans-serif;. Drop the italic axes from the URL if the design never uses them; each style is a separate file.
3. GitHub source — the cadsondemak/Thasadith repository holds the font files and the project notes on the Srisakdi spin-off.

Best use cases

Thasadith is the body face for retrospective Thai editorial — the running text under a Srisakdi headline, or any layout that wants period flavour at reading sizes. Strong briefs:

• Heritage and museum publishing where Srisakdi sets the titles
• Cultural magazines and essays on pre-modern Thai subjects
• Packaging for craft and tradition-led brands that need legible back-of-pack text
• Mixed Thai-Latin editorial that needs working italics in both scripts

Where it fails: data-dense interfaces and design systems, where two weights cannot carry the hierarchy; contemporary tech branding, where the manuscript undertone works against the message — Kanit or Bai Jamjuree fit that brief better.

Pairings

Thasadith pairs upward with its parent display face and sideways with neutral sans for utility text. Three pairings:

• Srisakdi — the family pairing: Rattanakosin handwriting for titles, Thasadith for everything readable
• Maitree — looped serif for pull quotes and captions inside the same antique register
• Kanit — geometric sans for navigation and tables when Thasadith carries the prose

Pairing logic for display-text systems is in the typography guide.

Licensing

Thasadith is released under the SIL Open Font License — free for commercial use, web embedding, modification, and bundling, provided the OFL notice travels with the files. Verify at the Google Fonts specimen or the GitHub repository. All four styles, including both italics, carry identical terms; there is no paid cut anywhere in the family.

Information verified as of June 2026