If you still want portability for uTorrent Classic (not Web), you can try this method, though it's unsupported:
Warning: This is not recommended for uTorrent Web because the web version’s components are fragmented across the system. utorrent web license key file portable
Putting it all together: You cannot find a legitimate "uTorrent Web license key file portable" because such a thing does not exist. What you will find are malware traps, fake key generators, and outdated cracks that will infect your system. If you still want portability for uTorrent Classic
Security tools like Detect It Easy or PEiD can tell if an executable is packed (compressed to hide code). Most legitimate portable software is not packed; malware almost always is. Warning: This is not recommended for uTorrent Web
Extract the downloaded uTorrent Web application to the portable folder you created.
If your heart is set on the uTorrent brand, just use the free uTorrent Web. It has ads, but it requires no license key at all. Download it only from the official website. It is not portable, but you can install it, use it, and uninstall it cleanly when done.
Let’s break down what users actually want when they type this phrase: