PDF Password Protecter Downloader - Version 3 Free Pdf encryption tool is fast and efficient solution for protecting your bulk pdf documents, supports both RC4 and AES encryption algorithms either 40 bit or 128 bit encryption level. This advanced application is compatible with all windows operating system including Windows 7. User can batch encrypt pdf files with support of various restrictions. It can set both type of passwords user password and owner password. User password protects pdf from unauthorized access and prompts for password when opening document, while owner password adds various user level restrictions. User can restrict pdf files from being print, edit, change, content copy on clipboard, form fill, sign, comment, extract, split and merge. Get pdf password protection software to lock pdf files with strong encryption algorithms. Download free trial version of pdf encryption to encrypt pdf file with watermark on out files to test and evaluate the product working and consider for purchasing if satisfied with evaluation. Some supported features of this program are as below: