The Inter UI font family

Inter UI is a font for highly legible text on computer screens.
Download the latest release or try it out in the playground

Sample

How much does it cost?

Inter UI is a free and open source font family. You are free to use this font in almost any way imaginable. Refer to the SIL Open Font License 1.1 for exact details on what the conditions and restrictions are.

 

How do I use it?

Using the font is as easy as download & installing locally on your computer.

You're free to bundle copies of Inter UI with your software, even if it's commercial and you charge money for your software. Inter UI can also be used on the web by either hosting the font files yourself or by including this CSS:

@import url('https://rsms.me/inter/inter-ui.css');

Use the following CSS rules to specify the Inter UI family:

font-family: 'Inter UI', sans-serif;

There are currently four weights

Features

Contextual alternates (calt)

DisabledEnabled 12:34, FEX12:34, FE—X 4.24.2 SFO -> STOSFO -> STO M@N [email protected][email protected] [email protected]

Tabular numbers (tnum)

DisabledEnabled 12345678901234567890 1131711 1131711  0040900 0040900 

Slashed zero (zero)

DisabledEnabled 01230123

Fractions (frac)

DisabledEnabled 1/3 22/9 3/4/5 1/3 22/9 3/4/5

Stylistic set #1: Open digits (ss01)

DisabledEnabled 1234567890 1234567890

Case alternates (case)

DisabledEnabled (Hello) [World] {9000} (Hello) [World] {9000} SCHOOL @ RUNSCHOOL @ RUN 3 + 9 = 12*3 + 9 = 12* * + ÷ ± × = * + ÷ ± × = ≠ • - :→ ← ⟶ ⟵ − - – — :

Also includes some Localized Forms (locl), Numerators (numr) and Denominators (dnom).

 

Glyph repertoire

The story behind Inter UI

Inter UI started out in late 2016 as an experiment to build a perfectly pixel-fitting font at a specific small size (11px.) The idea was that by crafting a font in a particular way, with a particular coordinate system (Units Per EM), and for a particular target rasterization size (11), it would be possible to get the best of both sharpness and readability.

However after a few months of using an early version of Inter UI, it dawned on everyone exposed to the test that this approach had some serious real-world problems. Most notably that it was really hard to read longer text. Because of the pixel-aligning nature of that approach, the font took an almost mono-spaced appearance, making it really easy to read numbers, punctuation and very short words, but eye-straining to read anything longer.

The project was rebooted with a different approach, sticking with the specific UPM, but crafting glyphs and kerning in a way that made for more variation in the rhythm and smoother vertical and horizontal stems. As Inter UI was being developed, it was tested on an internal version of Figma—where the author of Inter UI works as a designer—and slowly improved upon based on experience and feedback.

 

Current status & usability

Inter UI works great for English-language text, and pretty well for other Latin and Cyrillic languages. There's still a lot of work to be done, and contributions are warmly welcomed. The playground contains a lot of samples, including some common non English-language words in the playground.

Please refer to the glyph repertoire for an overview of currently-available glyphs and their quality.

 

FAQ

@rsms