20+ Best Free & Open Source UI Component Libraries (2025) for Websites & Web Apps
If you’re building a website or a web application in 2025, you don’t need to start your UI from scratch. Today, the web is packed with free, open-source, production-ready UI component libraries that make development faster, cleaner, and more consistent.
These libraries offer buttons, forms, modals, dashboards, animations, layouts, and even complete page templates for React, Vue, Tailwind CSS, and vanilla HTML/CSS.
To save you hours of research, here is the ultimate, updated list of the best ready-made UI component libraries—free, open source, and perfect for modern web development.
Why Use Readymade UI Libraries?
Because they help you:
- 🚀 Build production apps 5× faster
- 🎨 Maintain consistent, beautiful UI
- 📱 Ensure responsiveness across all screens
- ♿ Improve accessibility instantly
- 🛠️ Reduce design-developer handoff issues
- 🧩 Stay aligned with modern design systems
Whether you’re a developer, designer, freelancer, startup founder, or building your SaaS — this list is your go-to resource.
Most Popular General-Purpose UI Libraries
| Name | Stack | Description & Usage | Link |
|---|---|---|---|
| MUI (Material UI) | React | Google’s Material Design, extensive set | https://mui.com |
| Chakra UI | React | Modern, accessible, styling flexibility | https://chakra-ui.com |
| Ant Design | React | Enterprise-grade, clean look | https://ant.design |
| Bootstrap | HTML/CSS/JS | Classic, huge ecosystem, ready themes | https://getbootstrap.com |
| React Bootstrap | React | Bootstrap rebuilt for React | https://react-bootstrap.github.io |
Trending Tailwind CSS Ecosystem Libraries
| Name | Stack | Highlights | Link |
|---|---|---|---|
| Flowbite | Tailwind | 400+ UI blocks, dark mode, Figma kit | https://flowbite.com |
| DaisyUI | Tailwind | Super easy, 50+ components, out-of-the-box | https://daisyui.com |
| HyperUI | Tailwind | Focused on web apps & SaaS, 40+ components | https://www.hyperui.dev |
| Preline UI | Tailwind | 300+ components, multi-framework | https://preline.co |
| Sailboat UI | Tailwind | 150+ blocks (Alpine.js compatible) | https://www.sailboatui.com |
| Mamba UI | Tailwind | Modern, responsive, for landing pages | https://mambaui.com |
| TW Components | Tailwind | 3,000+ snippets from community | https://tailwindcomponents.com |
| Meraki UI | Tailwind | RTL/locales, 108+ styled comp | https://merakiui.com |
| Tailkit | Tailwind | 250+ blocks & templates | https://www.tailkit.com |
| Headless UI | Tailwind/React/Vue | Unstyled logic, full accessibility | https://headlessui.com |
“Drop-in” and Copy-Paste Libraries
| Name | Stack | Highlights & Usage | Link |
|---|---|---|---|
| Uiverse | HTML/CSS | Huge open-source copy-paste base | https://uiverse.io |
| UIVerseIO | HTML/CSS | Largest free open-source UI elements | https://www.uiverse.io |
| Tailblocks | Tailwind | Pre-built code blocks for landing pages | https://tailblocks.cc |
| Shadcn/ui | React/Tailwind | Accessible, customizable, CLI generates code | https://ui.shadcn.com |
| Magic UI | React/Tailwind | 150+ animated, interactive comps | https://magicui.design |
| Aceternity UI | React/Tailwind | Effects, transitions, copy-paste | https://ui.aceternity.com |
Advanced and Enterprise Libraries
| Name | Stack | Description & Usage | Link |
|---|---|---|---|
| Ant Design | React | Enterprise web apps | https://ant.design |
| NextUI | React | Modern, customizable, SSR ready | https://nextui.org |
| React Suite | React | Professional suite UI | https://rsuitejs.com |
| Onsen UI | React/Vue | Mobile-first, hybrid apps | https://onsen.io |
| React Bootstrap | React | Bootstrap for React | https://react-bootstrap.github.io |
Minimal & Utility-Based Libraries
| Name | Stack | Features | Link |
|---|---|---|---|
| PureCSS | CSS | Tiny, clean CSS modules | https://purecss.io |
| Spectre.css | CSS | Lightweight, responsive CSS | https://picturepan2.github.io/spectre/ |
| Bulma | CSS | Flexbox, modern, rapid | https://bulma.io |
Massive Aggregator/Explorer
- https://www.uiverse.io (HTML/CSS snippets from the community, all open source)
- https://btns.dev (Free buttons & UI patterns)
- https://www.figcomponents.com (Figma component explorer for design systems)
These open source UI libraries cover a huge range of needs—from modern apps to landing pages, admin panels, and mobile UIs, across every popular framework. All are updated for 2025, entirely free, and ready for rapid production or prototyping.
