DUCK File Extension

DUCK file icon
Cyberduck Bookmark
  • Developer
  • Popularity
    3.5 (4 votes)

What is DUCK file?

Full format name of files that use DUCK extension is Cyberduck Bookmark. Cyberduck Bookmark format was developed by Cyberduck. DUCK files are supported by software applications available for devices running Mac OS, Windows. DUCK file belongs to the Settings Files category just like 1087 other filename extensions listed in our database. Users are advised to use Cyberduck software for managing DUCK files, although 1 other programs can also handle this type of file. Software named Cyberduck was created by In order to find more detailed information on the software and DUCK files, check the developer’s official website.

Programs which support DUCK file extension

Below you will find an index of software programs that can be used to open DUCK files divided into 2 categories according to system platform supported. DUCK files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Programs that support DUCK file

How to open file with DUCK extension?

Being unable to open files with DUCK extension can be have various origins. Fortunately, most common problems with DUCK files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The list below will guide you through the process of addressing the encountered problem.

Step 1. Get the Cyberduck

The most common reason for such problems is the lack of proper applications that supports DUCK files installed on the system. The solution is straightforward, just download and install Cyberduck. Above you will find a complete listing of programs that support DUCK files, classified according to system platforms for which they are available. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Cyberduck website and download the installer.

Step 2. Check the version of Cyberduck and update if needed

If the problems with opening DUCK files still occur even after installing Cyberduck, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Cyberduck is available. Software developers may implement support for more modern file formats in updated versions of their products. This can be one of the causes why DUCK files are not compatible with Cyberduck. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Cyberduck.

Step 3. Associate Cyberduck Bookmark files with Cyberduck

If the issue has not been solved in the previous step, you should associate DUCK files with latest version of Cyberduck you have installed on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

The procedure to change the default program in Windows

  • Clicking the DUCK with right mouse button will bring a menu from which you should select the Open with option
  • Next, select the Choose another app option and then using More apps open the list of available applications
  • To finalize the process, select Look for another app on this PC entry and using the file explorer select the Cyberduck installation folder. Confirm by checking Always use this app to open DUCK files box and clicking OK button.

The procedure to change the default program in Mac OS

  • Right-click the DUCK file and select Information
  • Open the Open with section by clicking its name
  • From the list choose the appropriate program and confirm by clicking Change for all....
  • Finally, a This change will be applied to all files with DUCK extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Ensure that the DUCK file is complete and free of errors

Should the problem still occur after following steps 1-3, check if the DUCK file is valid. Being unable to access the file can be related to various issues.

1. The DUCK may be infected with malware – make sure to scan it with an antivirus tool.

Should it happed that the DUCK is infected with a virus, this may be that cause that prevents you from accessing it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. DUCK file is infected with malware? Follow the steps suggested by your antivirus software.

2. Verify that the DUCK file’s structure is intact

If you obtained the problematic DUCK file from a third party, ask them to supply you with another copy. During the copy process of the file errors may occurred rendering the file incomplete or corrupted. This could be the source of encountered problems with the file. When downloading the file with DUCK extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Check if the user that you are logged as has administrative privileges.

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Check whether your system can handle Cyberduck

If the system is under havy load, it may not be able to handle the program that you use to open files with DUCK extension. In this case close the other applications.

5. Ensure that you have the latest drivers and system updates and patches installed

Latest versions of programs and drivers may help you solve problems with Cyberduck Bookmark files and ensure security of your device and operating system. It may be the case that the DUCK files work properly with updated software that addresses some system bugs.

Do you want to help?

If you have additional information about the DUCK file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on DUCK file.

Top File Extensions
Show more
File Extension of the day
sqlite icon


SQLite Database Format

Files stored in the SQLITE format are data base files created with the SQLite libraries – a system for capturing and managing data bases. Dat...