Click the "Select File" button above, and choose your OBB file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert OBB to another file type
To convert OBB expansion files to another format, you need Android OS or other Compressed software.
Convert a file to OBB
To convert other file formats to the "Android App Expansion File" file type, you need software like Android OS or a similar tool.
About OBB files
An .OBB file is an Opaque Binary Blob used as an Android application expansion file. It stores heavy game assets such as graphics, sound effects, and video clips that exceed the 100MB size limit of a standard Google Play Store app package (APK). These files are typically read directly by the Android operating system or game engines. On a PC, you can often explore them using archive utilities like 7-Zip or engine-specific unpackers for formats like UnityFS. The primary disadvantage of the .OBB format is that it is a closed, often proprietary data container, not a standard media file. Files frequently exceed 1GB in size, making them difficult to share, transfer, or process on typical web platforms. Because they are structured as archives rather than single documents, standard online converters fail to process them. Users usually want to extract the contents to standard formats like ZIP, PNG for textures, or MP3 for audio. Extracting files from specialized game engine containers may result in the loss of structural metadata or require advanced unpacking software. This file format is difficult to open or convert because it is meant strictly for the internal use of a specific application. Often, only the original software or a specialized game asset extractor can properly read or export the data. If our analysis detects a supported underlying format like an uncompressed ZIP, viewing or converting the internal contents may still be possible.
Convert.Guru analyzes your OBB file, detects the exact format, and lets you read the text inside.
If you want to convert OBB file to APK, ZIP, CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF or DAT, you can use Android OS or similar software from the "Game Asset Data Archive" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to OBB, try Android OS or another comparable tool in the "Game Asset Data Archive" category.
The OBB Converter Story
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 OBB converter.