It’s an HTML, CSS, and JS framework for designing websites and web applications that can be used by every user, for any device, and for any size project. Web developers can use it as a great starting point.
Bootstrap CDNs (Free):
- https://www.bootstrapcdn.com/ – Powered by StackPath
- https://cdnjs.com/libraries/twitter-bootstrap – Powered by CDNjs
- http://www.jsdelivr.com/projects/bootstrap – Powered by jsDelivr