I bring you a great tool Enstella 7z Password Recovery Software which helps you to recover password protected 7z. It gives you 3 methods which are easy/safe Brute Force Attack, Mask Attack and Dictionary Attack techniques. Choose your method and recover 7z password easily. It works with 7z files with any character combination like alphabetic, numeric, special characters etc. and you can easily run it on any operating system. You can download it from the link given below.

INFO;-Extract password protected 7z