If you also want to unlock a 7z file without password, then you can use eSoftTools 7Z Password Recovery software. This software supports all types of 7Zip. This software recovers passwords in all languages. It provides three best ways to recover passwords: Brute Force Attack, Mask Attack, and Dictionary Attack. This software also provides a free demo for all its users and in the free demo, it recovers the first three letters.

INFO;-Unlock 7z file without Password