Bootstrap on kõige populaarsem CSS-i raamistik. Bootstrapil on lai valik tööriistu, mis toetuvad korduvkasutatavale koodile, tänu millele ei pea veebisaiti nullist välja töötama. Bootstrapi kasutatakse Front-End arendusraamistikuna.

Bootstrap is the most popular CSS Framework for developing responsive and mobile-first websites. Bootstrap is a wide array of tools that rely on re-usable code so that you don't have to develop the building blocks of a website from scratch. To build websites that are as responsible as possible, Bootstrap makes the process easier by letting users utilize it as a Front-End development framework.