For many, extensions are the most accessible method for "pen-testing" or research because they automate the interception of keys during playback. Widevine L3 Decrypter : Available on the Mozilla Add-ons store
If you are serious about decryption and willing to learn, WKS-KEYS is the gold standard alternative to GetWVKeys. getwvkeys alternative
: It mimics the original getwvkeys API and interface. For many, extensions are the most accessible method
Useful for testing, but unreliable for long-term projects. Do not depend on these for serious archiving. Useful for testing, but unreliable for long-term projects
Before diving into the alternatives, it’s important to understand why GetWVKeys is no longer the go-to solution for most users:
WKS-KEYS is a popular open-source rewrite of the older pywidevine. It simulates a Widevine CDM client, challenges a license server, and extracts the decryption keys (if you have a valid device’s private key and client ID blob).