Unofficial key sites are notorious for intrusive pop-ups, redirects, and potential malware risks.
Windows License: Free Personal / Paid Commercial
: Widely considered the best free tool for gathering a full profile of your hardware and software, including serial numbers for Windows and Office. MyKeyFinder
combined with SnakeUSBIP gives you a complete free and open-source solution for sharing USB devices across networks.
Mature, stable, and completely free with no strings attached. Excellent for basic serial debugging where modern UI isn't a priority.