Tachyons
Vanilla Framework CSS
You know how building a website can feel like a lot, especially when you’re trying to style every little thing yourself? Buttons, forms, layouts… it adds up fast. That’s where UI frameworks really save the day. They give you a bunch of premade design elements that you can just drop in and go. It’s like having a design starter pack that helps your site look clean and professional, without spending forever tweaking the details.
Tachyons is a functional/atomic CSS framework that uses small, reusable utility classes. Instead of big UI components or deeply nested CSS, Tachyons encourages developers to style elements using many tiny, single-purpose classes.
Let's check by the example,
1
2
3
<button class="f6 link dim br3 ph3 pv2 mb2 dib white bg-dark-blue">
Click Me!
</button>Here, each class f6, br3, ph3 controls a specific CSS property like font size, border radius, padding, etc. This modular approach makes styling predictable and reusable.
Tachyons was one of the innovator of the utility-first CSS movement—it influenced modern frameworks like Tailwind.


Vanilla Framework is an open-source, lightweight, and extensible CSS framework developed by Canonical (the creators of Ubuntu). It’s designed to provide a consistent and responsive design foundation without unnecessary bloat. Unlike component-heavy frameworks such as Bootstrap or Foundation, Vanilla focuses on clean base styles, responsive layouts, and utility classes that can be extended into full design systems.
It’s particularly popular for enterprise projects and design systems where consistency, accessibility, and scalability matter more than having hundreds of prebuilt UI widgets.


UI frameworks make building a polished website way easier. Whether you're working on something simple or a big project, they help you get things looking just right without having to stress over every little design decision. With ready-to-use components, responsive layouts, and modern styles, you can build faster and smarter.
So, pick one that works for you, and start creating a site that looks amazing from the get-go.
Include via CDN, install with npm, or build a custom version with PostCSS.
Tachyons is utility-first and functional using small, single-purpose classes combined directly in HTML.
Very lightweight, under 14 KB gzipped, and you can slim it down further by removing unused modules.
Yes, through custom builds, CSS variables, or tools like Components AI for theming.
Yes, many developers build full, responsive, and accessible UIs using only Tachyons plus basic CSS knowledge.
Yes, it is open-source and completely free to use under the LGPLv3 license.
No, it’s a CSS-only framework, so you need to implement JavaScript for dropdowns, modals, etc.
Yes, for basic usage. But customization requires some knowledge of Sass.
It is used by Canonical (Ubuntu) and related projects, but developers can also use it for general web projects.
If you want a lightweight, enterprise-ready design system with a focus on accessibility, Vanilla is great. But if you need ready-to-use components with JS support, Bootstrap might be better.