How to unlock a PDF without password known to me? If you are also searching for a solution to this query, then simply use PDF Unlocker Tool. Its an easy to use application that helps all users to easily learn how to unlock a PDF without password accessibility. The software also supports batch as well as selective modes for unlocking PDF files as per users’ requirements. Download free demo edition of the software and learn how to unlock a PDF without password knowledge, but only 1 PDF as free trial. Once you know complete process for how to unlock a PDF without password and want to perform the process in bulk, then go ahead to buy its licensed edition available at a nominal price.