To rule them all

One UI helps you focus on what really matters to you. We're bringing this concept to every screen possible in a modern, open and acessible way by using Web technologies.

hero image for One UI CSS

Built on Web technologies

All you need is a modern browser. One UI CSS was built using state of the art CSS Custom Properties, CSS imports and features a modern approach tested in major browsers.

Web Technologies logos

Enhanced with accessibility in mind

It's all the goodness of One UI made webby. This means we've tweaked some controls to adapt them to the web platform, focusing on accessibility and progressive enhancement.


All screens invited

Create web applications that run on phones, tablets, desktops... or any device that supports a modern browser.

All screens invited

Endless customization

CSS custom properties allow easy creation of themes to match your brand, and coupled with an open implementation, leverage endless customization to create your own version of One UI on the web.


Open to all

One UI CSS is open source. We want to leverage the power of open initiatives to take One UI to places it hasn't been before, all powered by your contributions and ideas.

Open Source Code