Iansui

But Ko · Handwriting · 1 style · ✓ OFL

Download Iansui

Size Tracking Ink Paper Click the specimen to type your own

The quick brown fox jumps over the lazy dog

Styles and weights

Regular 400 Pack my box with five dozen liquor jugs

Character set

ABCDEFGHIJKLMNOPQRSTUVWXYZ

abcdefghijklmnopqrstuvwxyz

0123456789

.,;:!?'"()[]{}<>@#$%&*+-=/\_

Subsets included: chinese-traditional, latin, latin-ext, symbols2

About Iansui

Iansui is a handwriting typeface designed by But Ko, published as an open-source font in 2025. It carries visible brush energy and a hand-made, childlike warmth, which shapes where it works best. The family ships 1 style.

Language support extends beyond basic Latin to chinese-traditional, latin-ext, symbols2. Because Iansui is licensed under the SIL Open Font License 1.1, you can use it in commercial work without buying anything or crediting anyone in the design itself.

Licence

✓ Iansui is free for commercial use

SIL Open Font License 1.1, verified by DaFontFonts

The SIL Open Font License is the most common open font licence. It permits use in any commercial or personal project, print, logos, websites, apps, products for sale, and allows modification and redistribution. The only real restrictions: you may not sell the font files by themselves, and if you modify the font you must rename it (if it uses a Reserved Font Name) and keep it under the OFL.

You can

Commercial use in any project, client work, products for sale, advertising
Logos and brand identities (including trademarked logos)
Web embedding (@font-face) and app embedding
Print: books, packaging, merchandise, print-on-demand
Modifying the font and redistributing modified versions (under the OFL, renamed if a Reserved Font Name applies)

Keep in mind

Selling the font files by themselves (bundling with software or designs is fine)
Modified versions must stay under the OFL and drop any Reserved Font Name

How we verify licences

Get the files

Desktop and print: The full family, 1 style, from the official source. Download Iansui
Web embedding: Self-host the woff2 for the fastest, most private setup.

@font-face { font-family: 'Iansui'; src: url('iansui.woff2') format('woff2'); font-weight: 400; font-display: swap; }

Get woff2

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Questions

Is Iansui free for commercial use?

Yes. Iansui is licensed under the SIL Open Font License 1.1, which permits commercial use in client work, products for sale, advertising, web and app embedding. There are no royalties and no attribution requirement in your designs.

Can I use Iansui in a logo?

Yes. The SIL Open Font License 1.1 allows logo use, including logos you register as trademarks. The licence covers the font software; your logo design remains entirely yours.

Do I need to credit But Ko when using Iansui?

No. Attribution is not required in designs, websites, or products. The only rule that ever applies: if you redistribute the font files themselves, keep the licence file with them.

How many styles does Iansui have?

Iansui includes 1 style: Regular.

What languages does Iansui support?

Character sets included: chinese-traditional, latin, latin-ext, symbols2. Check the character-set preview on this page before committing to a multilingual project.