Bootstrap Versions

Bootstrap is the world's most famous free CSS framework.
You can choose between the following versions:

B3

Learn Bootstrap 3 >>

Bootstrap 3 is the most stable version of Bootstrap, and it is still supported by the team for critical bugfixes and documentation changes.

B4

Learn Bootstrap 4 >>

Bootstrap 4 is a newer version of Bootstrap; with new components, faster stylesheet and more responsiveness. However, Internet Explorer 9 and down is not supported.

B5

Learn Bootstrap 5 >>

Bootstrap 5 is the newest version of Bootstrap; with a smooth overhaul. However, Internet Explorer 11 and down is not supported, and jQuery is replaced with vanilla JavaScript.