Just-in-time CSS, unlimited possibilities

Quickly prototype and build astonishing websites and UI components without installing and maintaining complicated software stacks.

Modern UI framework

Static CSS frameworks are shipped bundled with hundreds of classes you never use, resulting in higher load times. Assembler's critical mission is to improve the performance of your website by generating only the minimum amount of CSS each webpage needs.

Reusability for the win

Stop wasting your time by being redundant and create reusable mixins directly inside your CSS code. Apply them to your UI components and experience a better way of making web pages: no hassle, no preprocessing, no software to install.