Drop a .cab file here
or click to choose — opened on your device, never uploaded
A .cab (Microsoft Cabinet) file bundles several compressed files together, and Windows uses it for drivers, updates and installers. Open a .cab right in your browser, see what is inside, and download the files — or repackage everything into a standard .zip. No expand.exe, no installs, no uploads, no sign-up.
Drag your cabinet onto the box above or click it to pick a .cab file. The tool opens the archive in your browser, lists every file with its size, and lets you save any file on its own or choose Download as .zip to repackage the whole cabinet into a standard ZIP that opens natively on Windows and macOS.
The decoding runs on your own machine: the .cab is handed to libarchive, compiled to WebAssembly and driven from a background worker so the page stays responsive, with nothing to upload and no software to install. It is a quick way to pull one file out of a driver or update cabinet without unpacking it on the command line.
That worker pulls roughly 1 MB of WebAssembly from this site, and that decoder is the only thing this page ever requests. The honest test takes a few seconds: open your browser’s network panel, drop in a .cab, and read the list. Every request is for the decoder; your archive is not among them.
No file size limit is imposed here, since there is no upload and no server quota. The .cab, each file lifted out of it, and any ZIP being assembled all sit in memory at once, so what actually caps you is the free RAM on your device rather than a stated number.
Working with another format? Open a ZIP, a .tar.gz, or convert a RAR or 7z to ZIP.