Bootstrap is the world's most popular open-source CSS framework for building responsive, mobile-first websites and web applications. Developed by Twitter engineers in 2011, it provides a comprehensive collection of pre-built components, utilities, and a flexible grid system. Bootstrap includes styled components for navigation bars, buttons, forms, cards, modals, alerts, and dozens of other interface elements with consistent design patterns. The framework uses a 12-column responsive grid system that adapts layouts to different screen sizes using breakpoints. Bootstrap is built with Sass preprocessor, allowing developers to customize variables, colors, and component styles. Version 5 removed jQuery dependency, making it lighter and more modern. The framework is widely used in rapid prototyping, admin dashboards, corporate websites, and as a foundation for custom design systems.
Hosting countries
Where the sites' servers are located, from their IP address. A site on a CDN shows the CDN's country.
| Country | Share of located sites |
|---|---|
| 🇺🇸US | 42.1% |
| 🇩🇪DE | 15.6% |
| 🇫🇷FR | 12.3% |
| 🇳🇱NL | 5.5% |
| 🇯🇵JP | 5.3% |
| 🇬🇧GB | 4.7% |
| 🇷🇺RU | 4.2% |
| 🇮🇹IT | 3.8% |
| 🇨🇦CA | 3.6% |
| 🇮🇳IN | 2.9% |
This product includes GeoLite2 data created by MaxMind, available from https://www.maxmind.com.