A few days ago I was searching about How to open password protected 7zip file? then I found eSoftTools 7z password recovery software. There are 3 advanced techniques to unlock the lost password of the 7z file like Brute Force Attack, Dictionary Attack, and Mask Attack. It can support all GUI windows operating systems. Users can download a demo version file from the eSoftTools website to know the first 3 letters of forgot password.