To unlock the 7z file without a password you need to use this tool. eSoftTools 7z Password Recovery software.has come up with a smart solution to recover 7z passwords. It recovers passwords of all character combinations. You can unlock 7z files in a very short time by using the smart method of password recovery which gives you 3 smart methods to unlock, all methods work differently. You can try this software after downloading it for free from the link given below.

INFO;-Unlock 7z file without Password