Win Key Viewer is a fast little portable app that displays your Windows 10 product key.
Finding your product key can be a pain as it is hidden and encoded in the registry. Win Key Viewer allows you to grab and display the code quickly with zero navigation. All you need to do is unzip the file, run winkeyviewer.exe, and it will instantaneously find the key. The compiled data is then displayed from a simple window outlining the specific product, release/build numbers, product ID, and the key. The product key is the only field that can be copied.
If you need to find your Windows Key, etc., for whatever reason, then Win Key Viewer will get the job done quickly.