PDFTK is a command-line based tool for merging, splitting, encrypting, decrypting, compressing, decompressing and repairing PDF documents. GUI for PDFTK provides a graphical frontend for PDFTK.Note that under Windows XP, the program will report "The pipe has ended" after processing the PDF document. This is not an error! It indicates successful operation. Download the installer and extract to a folder of your choice. Remove $PLUGINSDIR and [NSIS].nsi. Launch guipdftk.exe.