Opening DECK Files

The DECK file type is primarily associated with Figma & Anki.

DECK	File extension: DECK
	File type:	data file

What is a DECK file

DECK files mostly belong to Figma & Anki. DECK files are not one single type of file. They are used by different applications to store collections of items.
For example,

Figma presentation files use a ZIP structure. These files hold design slides and layout data. You can view them by opening the file in Figma (Figma website).

Anki flashcard deck files use a plist format or other text encoding. They store flashcards used for spaced repetition study. Open these with Anki (Anki web).

Trading Card Game decks (for Digimon or Yu-Gi-Oh!) are text-based files using UTF-8 encoding. They list card configurations for use in respective game programs.

DeckTools project data files may store CAD drawing or project details. These require DeckTools software to view the designs.

Note: The internal structure of a DECK file—whether compressed, a property list, or plain text—indicates its origin. It is important to know the source of your file so you can open it with the proper application.
FilExt.com note: If you are unsure, try opening the file in a text editor to check for clues in the file encoding or structure. This can help you decide whether the file is a compressed archive or a simple text file.

How to open a DECK file

You need a suitable software like Figma & Anki to open a DECK 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 DECK file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a DECK file directly in the browser:. Just drag the file onto this browser window and drop it.

Online DECK Text Viewer

Choose your .deck file to analyze

or drag and drop it here

Online File Viewer

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DECK file extension format:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. The file format can be determined based on the file extension and the signature (the first few characters of a file). File extension, signature and file format must match; otherwise errors will occur when the file is opened. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our examination of the DECK files comes to the following conclusion:

DECK is not a common file extension and covers different formats for different programs. The two most popular formats are as follows:

• 25% of all DECK files internally utilize the plist file format. A property list file is a structured text file that contains user's settings or macOS apps configuration. The files are 7 KB to 4 MB in size, with a median of 84 KB. The following keywords are characteristic: bplist00, NSKeyedArchiver, Troot, X$versionY$archiverT$topX$objects, XjsonDataVimagesV$class, cards, index and U$null.
• 10% of all DECK files use ZIP compression, so several files are combined and compressed into one DECK file. Primarily 2 to 81 files are included. A little tip: If you rename the file extension to .zip and then double-click, you will see the included files and images. The files are 12 KB to 3 MB in size, with a median of 2 MB. Files like these are about simulator.

The remaining 65% of all DECK files are different files with different signatures, the following 4 formats exist: XML and DeckToolsProject. Files like these are sometimes linked to input. Drag & drop your file here to see the file format and a preview of your DECK file!