Opening ANKI21 Files

The ANKI21 file type is primarily associated with Anki.

ANKI21	File extension: ANKI21
	File type:	database

What is an ANKI21 file?

ANKI21 files mostly belong to Anki. The ANKI21 file is the flashcard database used by Anki 2.1. It is structured as an SQL (typically SQLite) database that stores decks, flashcards, review schedules, and progress data.
Purpose: It holds all the learning content needed for the spaced repetition system.
Functionality: When you run the Anki application, it reads from this file to display cards, update scores, and manage review intervals.

The file organizes flashcard data efficiently.

Its SQL format helps quickly retrieve and update information.

It is integral to the Anki learning process.

To open and view the file, use the Anki software. More details are available at the Anki website.
FilExt.com note: Do not attempt to edit the file directly to prevent data loss.

How to open ANKI21 files

You need a suitable software like Anki to open an ANKI21 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 ANKI21 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ANKI21 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online ANKI21 Text Viewer

Choose your .anki21 file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert ANKI21 files:

Anki
See the previous paragraphs to learn more about the main application. ANKI21 files are often referred to as Anki databases because this type of file is primarily created or used by this software.
Anki
The *.ANKI21 file extension signifies an Anki 2.1 flashcard database file. Anki 2.1, a free and open-source flashcard program, utilizes these files to store flashcards, decks, and related learning materials. The internal structure of an *.ANKI21 file adheres to the SQLite format, a lightweight relational database management system. This allows for efficient storage and retrieval of flashcard data, including text, images, audio, and video. The *.ANKI21 format represents a specific version (2.1) of the Anki software, and while Anki supports backward compatibility, newer versions may employ different file extensions or internal structures. Therefore, using the appropriate Anki version is crucial for seamless access and manipulation of these files. The *.ANKI21 files are essential for users of Anki 2.1, enabling them to create, organize, and review their personalized flashcard collections for efficient learning. This file format is classified as Database File.

ANKI21 file format:

Every file has a defined file format, i.e. how the data is arranged in the file. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. When there is a problem with a file, the first step to solving it is to determine the file format. In the following you will find our evaluation of the ANKI21 files:

ANKI21 is seldom used as a file extension and predominantly uses a uniform format. The following file formats are most commonly found in ANKI21 files:

99% of all ANKI21 files are using the well-known SQL file format to store the data. An SQL file contains a lightweight SQLite database, widely used in application development for storing application related data. These files are binary files, so they do not contain text, but only cryptic characters. The files are on average 220 KB in size and range from 150 KB to 1 MB. The file type was developed only in the last few years. The keywords SQLite format 3 are typical for these files. Some examples of file names are collection.anki21.

The remaining 1% of all ANKI21 files are different files with different signatures. If you want to find out what your ANKI21 file contains, drag and drop it onto this page.

Technical Data for ANKI21 File Extension

File classification:

Database

Related files:

anki2, apkg, colpkg, anki, sqlite, db

an anki21 database is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with ANKI21 files

Associate the ANKI21 file extension with the correct application.
Update your software that should actually open databases. Because only the current version supports the latest ANKI21 file format. Search, therefore, e.g. on the manufacturer website after an available Anki update.
To make sure that your ANKI21 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .ANKI21 file online - secure, fast, and no downloads needed.