converter-bs3-to-bs4 Bootstrap version: v4.0.0-beta Work in progress for bootstrap 4 final version Get started: Download zip Unarchive zip Open command line and go to project folder: run: cd path/to/converter-bs3-to-bs4 run: npm install Put your html files in html folder ex: my-project index.html folder1 page1.html page2.html ... run: gulp converter In the build folder you will find the bootstrap 4 code