The File Extensions Database

.AB File Extension

  • Developer by: Google
  • Category: Backup Files
  • Format: Binary

What is an .AB file?

.AB is Android ADB Backup File

Backup file created by adb (Android Debug Bridge), a command-line tool included with the Android SDK; can include both apps, system, and user data from an Android 4.0 or later device; used for saving and restoring device snapshots.

Often AB backups do not include the .APK apps themselves, but only the device's app and system supporting data. For example, you can backup the data of a connected Android device without the APK files by typing the following command:

adb backup -all

This creates the file backup.ab in the current directory. To include the APK files as well, use the following command:

adb backup -apk -all

To restore an AB backup file to the device, type the following command:

adb restore backup.ab

The adb program also includes options to include or exclude other types of data and to specify the backup filename. Consult the ADB documentation for further information.

Programs that open Android ADB Backup File
Google Android SDK
Google Android SDK
Google Android SDK
File Type 2 Ambling BookPlayer MP3 File
Developer by: Ambling Books Category: Audio Files Format: Binary

Audio file used by Ambling BookPlayer, an audio player for Android-based mobile phones; adds the ".ab" extension to a normal .MP3 file (or other audio file) and makes the compound extension ".ab.mp3;" used so that downloaded Ambling BookPlayer files aren't mixed with other audio files played by other music players.

Ambling BookPlayer has a preference named "Add .ab Extension" that controls whether or not the ".ab" extension is added to audio files. You can uncheck this option to disable file extension renaming.

Programs that open Ambling BookPlayer MP3 File
Ambling BookPlayer
File Type 3 Applix Builder File
Category: Developer Files

Project file created with Applix Builder, the the graphical programming module of Applixware Linux development software.

File Type 4 DNA Sequence File
Category: Data Files

Scientific data format used to store DNA sequence information; can be viewed graphically with a chromatogram viewer, which allows for rapid detection of mutations in DNA sequences and other DNA analyses.

Most DNA sequence files use the .ABI extension.

Programs that open DNA Sequence File
Heracle BioSoft DNA Baser

How to solve problems with AB files

  • Associate the AB file extension with the correct application. On :
    Windows: Right click on any AB file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.AB files". Mac: Right click (or Ctrl-click) the AB file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .AB is Android ADB Backup File. Because only the current version supports the latest AB file format. Search, therefore, e.g. on the Google manufacturer website after an available .AB is Android ADB Backup File update.
  • To make sure that your AB file is not corrupted or virus-infected, get the file again and scan it with antivirus software.