What is a DUCK file?
A .DUCK file is a Cyberduck Bookmark. Cyberduck is a popular file transfer client for FTP and cloud storage. It uses .DUCK files to save server connection details. These files store your server addresses, usernames, and folder paths.
How to open DUCK files?
The standard way to open a .DUCK file is with Cyberduck. When you open the file, the software reads the connection data and automatically logs you into the correct server. Because the file uses the standard XML format, you can also view its contents using a basic text editor like Notepad++ or Visual Studio Code.
Inspect your file with viewer.online
If you do not have Cyberduck installed, viewer.online/duck analyzes .DUCK files to identify their exact format and creator software. It shows which programs can open the file and usually previews it directly in your browser. If a .DUCK file has multiple possible meanings, viewer.online/duck easily identifies the actual format of your specific file.
Summary
Because .DUCK files use the known XML format, viewer.online/duck can safely open and display them online, eliminating compatibility problems.