⚡ User Interface Frameworks in Belgium

User Interface (UI) frameworks are libraries of code, design elements, and components that help web developers create user interfaces with consistent structure and behavior.

Belgium is a Western European country with a population of over 12 million people.

According to our research, user interface frameworks are used on 46% of websites from Belgium.

⭐ Most Popular in 2026

The following chart shows the top UI frameworks in Belgium in 2026, based on market share.

The most popular is Bootstrap with a substantial share of 63.7%, followed by jQuery UI with 35.4% and Tailwind CSS with 9%.

Bootstrap 63.7%
jQuery UI 35.4%
Tailwind CSS 9%
Foundation 3%
UIKit 2.2%
Bulma 0.9%
AMP 0.8%
Headless UI 0.4%
Angular Material 0.3%
Material UI 0.3%
Materialize 0.3%
Radix UI 0.2%
Spectre.css 0.2%
W3.CSS 0.2%
Pure CSS 0.1%

🚀 Highlights

Here is a list of the top frameworks that are more popular in Belgium than worldwide.
Differences between global and country rankings are shown in parentheses.

5. UIKit ^(-1)
6. Bulma ^(-1)
8. Headless UI ^(-4)
9. Angular Material ^(-4)
15. Pure CSS ^(-1)
16. MDB ^(-1)
17. Kendo UI ^(-2)
18. Semantic UI ^(-2)
19. Chakra UI ^(-2)
20. Material Design Lite ^(-2)

✨ Best UI Frameworks

Below is a more detailed list of the top 25 of the 41 UI frameworks used on sites from Belgium, ranked by their market share.

Rank	Name	Market share
1	Bootstrap San Francisco, California, United States An open-source framework for building responsive, mobile-first websites and web applications with HTML, CSS, and JavaScript, originally developed at Twitter. FreeOpen source	63.7%
2	jQuery UI San Francisco, California, United States A curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. FreeOpen source	35.4%
3	Tailwind CSS Kitchener, Ontario, Canada An open-source utility-first framework that provides low-level CSS classes for building user interfaces directly in markup. FreeOpen source$149+	9%
4	Foundation Campbell, California, United States An open-source responsive framework that provides a customizable grid system, a library of UI components, HTML templates, and JavaScript plugins. FreeOpen source	3%
5	UIKit Hamburg, Germany A lightweight and modular front-end framework. FreeOpen source	2.2%
6	Bulma London, United Kingdom An open-source modular CSS framework based on Flexbox. FreeOpen source	0.9%
7	AMP San Francisco, California, United States An open-source HTML framework for creating lightweight pages that are optimized for mobile web browsing and load faster. FreeOpen source	0.8%
8	Headless UI Kitchener, Ontario, Canada Completely unstyled, fully accessible UI components, designed to integrate beautifully with Tailwind CSS. FreeOpen source	0.4%
9	Angular Material Mountain View, California, United States A library of UI components for Angular that implements Google's Material Design specification. FreeOpen source	0.3%
10	Material UI Paris, France An open-source React component library that implements Google's Material Design. FreeOpen source$180+/developer/year	0.3%
11	Materialize Pittsburgh, Pennsylvania, United States A responsive CSS framework based on Google's Material Design guidelines. FreeOpen source	0.3%
12	Radix UI San Francisco, California, United States An open-source component library that provides low-level, unstyled interface primitives for building accessible user interfaces and design systems in web applications. FreeOpen source	0.2%
13	Spectre.css Shanghai, China A lightweight, responsive CSS framework designed for faster and extensible development. FreeOpen source	0.2%
14	W3.CSS Sandnes, Norway An open-source, pure CSS framework developed by the W3Schools team, designed for building responsive websites without JavaScript. FreeOpen source	0.2%
15	Pure CSS New York, United States A lightweight, responsive CSS framework developed by Yahoo for building fast and minimal web interfaces. FreeOpen source	0.1%
16	MDB Warsaw, Poland A UI toolkit that combines Bootstrap with Google's Material Design guidelines. FreeOpen source€29+	0.1%
17	Kendo UI Burlington, Massachusetts, United States A commercial bundle of four JavaScript UI libraries built natively for jQuery, Angular, React, and Vue. FreeOpen source$799+/year	0.1%
18	Semantic UI New York, United States An open-source component framework that helps create responsive layouts using human-friendly CSS class names. FreeOpen source	0.1%
19	Chakra UI Manchester, United Kingdom A comprehensive library of accessible, reusable, and composable React components. FreeOpen source	0.1%
20	Material Design Lite Mountain View, California, United States A legacy user interface framework that implements Material Design components using plain CSS, JavaScript, and HTML without external dependencies. FreeOpen sourceLegacy	0.09%
21	Tachyons Boise, Idaho, United States A lightweight, functional CSS framework that enables the creation of fast, responsive, and accessible web interfaces without writing custom CSS. FreeOpen source	0.09%
22	Vuetify Southlake, Texas, United States An open-source, no design-skills-required UI library of beautifully handcrafted Vue components. FreeOpen source	0.06%
23	Shoelace A framework-agnostic library of production-ready web user interface components built entirely with native Web Component standards, ensuring consistent design and behavior across any JavaScript framework or none at all. FreeOpen source	0.06%
24	Mantine An open-source React component library that includes over 100 customizable components. FreeOpen source	0.04%
25	PrimeFaces Ankara, Turkey An open-source JavaServer Faces framework with over 100 components, a touch-optimized mobile kit, client-side validation, and a theme engine. FreeOpen source$249+	0.03%

👉 See Also

🌎 UI Frameworks in other countries

Data is based on the analysis of 26,849 websites from Belgium.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.