CSS framework gives web developers a basic structure, which includes grid, interactive UI patterns, web typography, tooltips, buttons, form elements, icons. This structure helps web developers to start quickly and efficiently when they are designing a website or web applications.

That means developers can free themselves from starting everything from scratch. CSS framework will create a solid foundation for them. Besides, developers can also reuse code in all projects they work on.

Bootstrap is one of the most popular CSS Frameworks. The current version of this framework is Bootstrap 4, which was released in 2018. Many significant features were introduced in this release, such as new color schemes, new modifiers, new utility classes, etc.

In addition, version 4 of Bootstrap is built with SASS, and that means Bootstrap is now supported both LESS and SASS.

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Foundation and Bootstrap are both the widely used CSS frameworks. But Foundation is a way more sophisticated framework. It is very flexible and easily customizable.

It is a useful tool to create responsive websites and web apps, especially for the enterprise. Facebook, eBay, Mozilla, Adobe, HP, Cisco, and Disney use Foundation in their products.

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Pure is a lightweight and responsive CSS framework created by Yahoo in 2014. It is built using Normalize.css and help you create responsive layouts using its Grids and Menus. Pure is responsive by default, and unlike Bootstrap, it doesn’t allow creating fixed layouts.

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Bulma is a free and open-source CSS framework based on the Flexbox layout model. It is lightweight, responsive, pure-CSS, and mobile-first.

All these features made Bulma one of the most popular CSS frameworks along with Bootstrap and Foundation. Bulma has more than 150 000 users, more than the Foundation.

Bulma provides the developers with readable CSS class names and ready-to-use components to build mobile-friendly interfaces. It is incredibly easy to recognize and remember the CSS class names because all of them are named logically.

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Semantic UI is a responsive front-end framework that uses human-friendly HTML. You can build beautiful, responsive layouts with its 3000+ Theming Variables and 50+ UI Components.

It also integrated with a lot of third-party libraries, including React, Angular, Meteor, Ember, and many other frameworks. All this helps you organize your UI layer alongside your application logic.

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UI Kit is a lightweight CSS and web UI design framework, which offers almost all the features of other frameworks.

You can create simple, clean, and modular web interfaces with its SVG icons set, many components, responsiveness, unified styles, and customization options. Besides, you can also design complex flexbox-based layouts with UI Kit using plain HTML.

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Materialize CSS is a responsive front-end framework created by Google in 2014. It’s the right solution for anyone who wants to design websites or Android web apps because it comes with ready-to-use classes and components. You can quickly get started using its starter templates.

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Milligram is one of the lightest CSS frameworks that can help you design fast and clean websites. The solution’s weight is 2KB (gzipped).

But despite its small size, Milligram comes with a complete set of web development tools. Developers can also use all the features offered by CSS3 specification with Milligram. These can add much power to Milligram and made it one of the top three lightweight frameworks available.

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Skeleton is a minimal responsive CSS framework which contains only 400 lines of source code. Despite its relatively small size, it offers a lot of options (grids, typography, buttons, forms, lists, tables, code, etc.) that allow you to create complex websites.

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Tailwind CSS is a highly customizable and low-level CSS framework. Unlike Bootstrap that creates a generic-looking UIs, Tailwind allows you to customize your designs and create a unique look and feel.

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Spectre.css is a great framework that can help you do faster and extensible development with the elegantly designed elements, beautiful typography, and pre-built components.

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Base is a responsive CSS framework that has a lightweight and minimal code. It is simple, clean, minimal yet powerful. Web developers and designers can create responsive websites and web applications with its solid foundation.

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Picnic is another lightweight CSS library with a size of less than 10kb (when gzipped). It provides you pure-CSS and interactive components, including grid, forms, tabs, tooltips, and alerts. The library helps you create a responsive website and beautiful web applications.

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Looking for a CSS framework for starters? Try Mustard UI. It is an open-source, lightweight CSS framework specially designed for newcomers. You can start with the essential building blocks because it has split into modules.

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Dead Simple Grid is a useful tool with only 250 bytes of CSS code and only two classes. It may not be considered as a complete CSS framework, but it’s handy when web developers want to use a grid system.

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Best CSS Frameworks For U