While downloading the file fixes the immediate problem, Bootstrap 3 is no longer actively maintained. For new projects, consider:
By default, bootstrap.css expects the fonts to be in a folder named ../fonts/ . If your file structure looks like this: /css/bootstrap.css /fonts/glyphicons-halflings-regular.woff
Visit the Bootstrap Expo or the GitHub Releases page for v3.4.1. download glyphicons-halflings-regular.woff
If you are using a Windows Server (IIS), the .woff or .woff2 files might return a 404 even if they are present. You must add the in IIS Manager: .woff : application/font-woff .woff2 : font/woff2 3. Cross-Origin Resource Sharing (CORS)
Which uses Bootstrap Icons (available as SVGs or web fonts). While downloading the file fixes the immediate problem,
The .woff (Web Open Font Format) file is a compressed font format designed specifically for use on the web. The set was bundled exclusively with Bootstrap 3 through an arrangement with Glyphicons .
Understanding and Downloading glyphicons-halflings-regular.woff If you are using a Windows Server (IIS), the
When a browser loads a Bootstrap 3 site, it looks for this file in a /fonts/ directory relative to the CSS. If the file is missing, icons will appear as empty squares or strange characters like "". How to Download the Official Files