Hi Well it Depends on what version of Excel the file was initially saved with. If its the older 23 format there are several programs that will do this for you for free if you search the internet. If its 27 or newer then Microsoft shifted to 128bit AES encryption for Office Documents. There are programs that will reset this password but they will do this by a brute force method which could take some time... Regards Feel free to ask in future..)