If you want to remove encryption from Excel due to a lost password. Then I recommend you to use eSoftTools Excel Password Recovery software, with the help of this tool you can easily recover Excel file passwords in less time. This tool has three password recovery attacks: Dictionary Attack, Mask Attack, and Brute Force Attack. This is a simple password recovery technique. You can easily use this tool on every version of the Windows operating system. Click on the link for more information.

INFO;-Remove encryption from Excel