Extract text from Flashcard decks (FDK)
To convert FDK Decks to another format, you need Flashcard_Deluxe or other Data software.
To convert other file formats to the "Mobile Education Data" file type, you need software like Flashcard_Deluxe or a similar tool.
The .fdk extension primarily serves two distinct technical ecosystems, creating confusion for users trying to open them.
Most commonly, an .fdk file is a Flashcard Deluxe Deck, a container format used by the Flashcard Deluxe mobile app. These files are technically renamed ZIP archives that bundle text-based card definitions with associated media assets (images and audio). The primary difficulty is that while the app handles them seamlessly, desktop users cannot easily view or edit the card data without renaming the file or using specific import tools. Users typically need to convert these decks to CSV or XLSX to bulk-edit vocabulary lists in spreadsheet software, or to standard ZIP format to extract the embedded media files for use in other learning platforms like Anki.
Alternatively, in enterprise environments, an .fdk file may be a database backup created by the Firebird RDBMS (though fbk is the standard convention, .fdk is used in specific implementations). These are binary files that cannot be opened by text editors or web browsers. They are essentially "frozen" snapshots that must be restored using the gbak utility before data can be accessed. Users handling these files often need to convert the data to SQL scripts, CSV dumps, or live FDB database files to migrate legacy data to modern systems.
Convert.Guru analyzes your FDK file, detects the exact format, and lets you read the text inside.
Users also converted APKG, ANKI and CARDS files.
If you want to convert FDK file to , you can use Flashcard_Deluxe or similar software from the "Digital Flashcard Deck Storage" category. In the File menu, look for Save As… or Export….
To convert files to FDK, try Flashcard_Deluxe or another comparable tool in the "Digital Flashcard Deck Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our FDK converter.