OBB File - opening and understanding

Did your computer fail to open an OBB file? We explain what they are used for and recommend software that we know can open or otherwise handle your .OBB files.

What is an OBB file?

An .OBB file is an Opaque Binary Blob file. The OBB file format was developed by Google for its Android system. This file format is used by Android app developers to package large files that are used by their apps on the user's Android device.

There are shared and proprietary .obb files. Resources stored in shared OBB files can be used by different apps. For example, an OBB file with map data may be shared and used by Android apps that have been granted access rights to the map data in those .obb files.

Proprietary OBB files, on the other hand, are unique to a single app.

Android developers use Linux applications like Obbtool and MKOBB.SH to create .obb files. It's recommended to leave these OBB files alone, in order to ensure that the Android apps that need to use them can continue to work properly.

You usually do not need to edit or view these files, as they only contain information usable by the software program that uses them.

Suggest another file format using extension OBB

While we know of one file format using the .OBB file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .OBB file.