CAB to WIM Converter
Processing entirely on your device — large files may take a moment.
Extracting WIM to ZIP exposes the files inside Windows images without deployment tools. If your files are still in CAB format, this page is the shortcut: CAB is Microsoft's installer cabinet format — drivers, Windows updates and legacy installers arrive as CAB files.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How CAB compares to WIM
| CAB | WIM | |
|---|---|---|
| Compression | MSZIP / LZX | XPRESS/LZX variants |
| Encryption | None | None (split WIMs exist) |
| Bundling | Multi-file with folders | Filesystem image, multiple images per file |
| Best for | Drivers and Windows updates | Windows deployment media |
How to convert CAB to WIM
- 1
Select your files
Drag & drop your CAB files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to WIM". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted WIM file individually, or grab everything at once as a ZIP archive.
About the CAB format
CAB (Cabinet) is Microsoft's own archive format, built for software distribution: Windows update packages, device drivers and legacy installers arrive as CAB files. It supports MSZIP, Quantum and LZX compression, and Windows Explorer actually opens it — on Windows.
Everywhere else it is a locked box. Converting CAB to ZIP makes driver payloads and update contents readable on macOS, Linux and phones — useful when you need a driver file on a machine that cannot run the installer.
+ Strengths
- ✓Native to Windows software distribution
- ✓Efficient LZX compression for its era
! Limitations
- −Windows-centric — opaque elsewhere
- −No encryption or recovery features
About the WIM format
WIM (Windows Imaging Format) is how Microsoft ships Windows itself: the install media and deployment images are WIM files, holding a complete filesystem snapshot with single-instancing (identical files stored once). It is Windows' answer to tar — file-based rather than sector-based.
Opening one without deployment tooling (DISM, 7-Zip on Windows) is awkward. Extracting WIM to ZIP exposes the files inside — drivers, scripts, provisioned apps — on any system, no Windows required.
+ Strengths
- ✓Windows' native image format
- ✓Single-instancing deduplicates identical files
! Limitations
- −Opaque without Microsoft tooling
- −Files inside may be Windows-locked
Why convert CAB to WIM?
Think of it as moving your file to the container that fits the job. Windows-centric — opaque elsewhere WIM works differently: Windows' native image format If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this CAB to WIM converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for CAB to WIM?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Are the files inside my CAB archive modified?
No. Contents are unpacked in memory and repacked into WIM byte-for-byte — the conversion changes the container, never the files inside it.
What about folders and directory structure?
The full directory tree is preserved: folders stay folders, and deep paths arrive exactly as they were packed in the CAB file.