1. Extract the downloaded file (glyphicons.zip) 2. Copy the "glyphicons" folder to "ckeditor/plugins/" folder 3. Open the file "ckeditor/config.js" 4. Add theses lines: config.extraPlugins = 'glyphicons'; config.contentsCss = 'path/to/your/bootstrap.css'; config.allowedContent = true; 5. In your HTML's section add this code: 6. Make sure to clear your browser's cache 7. Done