A daily updated filename extension database!

DUCK file extension

The table below provides useful information about the .duck file extension. It answers questions such as:

  • What is the .duck file?
  • What program do I need to open a .duck file?
  • How can the .duck file be opened, edited or printed?
  • How can I convert .duck files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Cyberduck Bookmark

DUCK file is a Cyberduck Bookmark. Cyberduck is a free and open source (GPL) software package that can be used to connect to FTP, SFTP, WebDAV, S3, or any OpenStack Swift-based object storage such as SoftLayer object storage.
DUCK format description not yet available
Category: Data files
Application: Cyberduck
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
DUCK aliases:
DUCK related links:
DUCK related extensions:

Other types of files may also use the .duck file extension.

🚫 The .duck file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

dck, duc, suck

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Resolume Deck
Action Replay DS Max Save
SiteSucker Website Data

🔴 Can't open a .duck file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .duck file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .duck file extension, write to us!

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