Click the "Select File" button above, and choose your FFU file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert FFU to another file type
To convert FFU update files to another format, you need DISM or other Disk Image software.
Convert a file to FFU
To convert other file formats to the "Firmware Update Image" file type, you need software like DISM or a similar tool.
About FFU files
An .FFU file is a sector-based Full Flash Update image primarily used by Microsoft to deploy Windows operating systems to hard drives, SSDs, and IoT devices. A smaller percentage of these files act as UFS Firmware Updates managed by UEFITool. Administrators apply .FFU files using the DISM (Deployment Image Servicing and Management) command-line tool. The main disadvantage of the .FFU format is its massive size and rigid structure. It is a highly inflexible, sector-by-sector copy of a physical disk. Because it is a proprietary container, you cannot easily double-click it to extract a single document. You also cannot open it natively in popular archive software like 7-Zip. Furthermore, an .FFU file captures the entire partition layout, meaning it can only be applied to a destination drive of equal or greater size. Users frequently need to convert .FFU files to standard virtual disk formats like VHD (Virtual Hard Disk), ISO, or IMG to mount them inside virtual machines. Another common target is the file-based WIM format, which is much more flexible for custom system deployments. The .FFU format is very difficult to open or convert because it is a closed, proprietary standard designed for low-level hardware flashing. Standard online converters fail to process it because they lack the complex algorithms required to parse Microsoft proprietary sector-mapping headers. Often, only the original deployment software can properly read or export the data. However, just drag and drop your file onto convert.guru to identify the exact format version and inspect the internal structure. If our analysis detects a supported embedded file system, viewing or partial conversion may still be possible.
Convert.Guru analyzes your FFU file, detects the exact format, and lets you read the text inside.
If you want to convert FFU file to VHDX, VHD, ISO, WIM, SYS, DLL, EXE, DRV, VXD, 386, COM or BAT, you can use DISM or similar software from the "OS Deployment and Firmware Update" category. In the File menu, look for Save As… or Export….
To convert MSI, EXE, REG, MST, LNK, CAB, CAT, DRV, INF, SYS, MSU or DLL files to FFU, try DISM or another comparable tool in the "OS Deployment and Firmware Update" category.
The FFU 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 FFU converter.