Opening FDK Files

The FDK file type is primarily associated with Anki.

FDK	File extension: FDK
	File type:	data file

What is an FDK file?

FDK files mostly belong to Anki. The FDK file format has two main uses. In one use, it is a flashcard deck file created for flashcard software such as Anki and Flashcards Deluxe. Its internal structure uses a ZIP archive layout, which means you can sometimes rename the file with a .zip extension and extract its contents to see the cards, media files, and related data.
In another use, an FDK file serves as a backup for Firebird databases. This backup stores the data of the database and must be restored using Firebird tools. For official details, visit Firebird SQL.
Key details compiled by FilExt.com include:

If the file is a flashcard deck, consider using a flashcard application or ZIP utility to inspect its content.

If it is a database backup, use Firebird’s restoration utilities.

How to open an FDK file

You need a suitable software like Anki to open an FDK file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your FDK file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a FDK file directly in the browser:. Just drag the file onto this browser window and drop it.

Online FDK Text Viewer

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Online File Viewer

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Programs that open and convert FDK files:

Anki
See the previous paragraphs to learn more about the main application. FDK files are often referred to as Anki data files because this type of file is primarily created or used by this software.
Fluentizer (FluentDictionary) by Fluentizer Inc.
Fluentizer is a computer program that will help you get fluent in verbal communications in a foreign language. Fluentizer also improves your reading skills and vocabulary. A FluentDictionary is a dictionary data file for the Fluentizer program. The Mime types used with this association are: application/octet-stream.
OS/2 (Saved SKF Format File) by IBM
This is a floppy disk image. To convert back to floppy disks, find and download the file LDF.COM to get the LOADDSKF.EXE program to unpack files to diskettes. Run LDF from the OS/2 command prompt. A program called LOADDSKF appears in the directory. Type LOADDSKF xxxxx A: to create the new diskette (xxxxx is the file name). The Mime types used with this association are: file/binary. Related links: OS/2 Shareware Web & BBS

Technical Data for FDK File Extension

File classification:

Data

Related files:

apkg, fdb, fbk, openfdk, fdx, tmp, zip, bak

Mime type:

application/octet-stream

an fdk data file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with FDK files

Associate the FDK file extension with the correct application.
Update your software that should actually open data files. Because only the current version supports the latest FDK file format. Search, therefore, e.g. on the manufacturer website after an available Anki update.
To make sure that your FDK file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
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