GUIPDFTK is just an interface for PDFTK to make it easier for you to handle the program and eliminate command line actions.

If PDF is electronic paper, then PDFTK is an electronic staple-remover, hole-punch, binder, secret-decoder-ring, and X-Ray-glasses. Pdftk is a useful tool for handling PDF documents. Every PDF user should have one in the top drawer of his/her desktop

Use it to:
· Merge PDF Documents
· Split PDF Pages into a New Document
· Decrypt Input as Necessary (Password Required)
· Encrypt Output as Desired
· Burst a PDF Document into Single Pages
· Report on PDF Metrics, including Metadata and Bookmarks
· Uncompress and Re-Compress Page Streams
· Repair Corrupted PDF (Where Possible)