jPDF Tweak is a Java Swing application that can combine, split, rotate, reorder, watermark, encrypt, sign, and otherwise tweak PDF files. Developed by Michael Schierl
License: Open Source
jPdf Tweak is a more versatile PDF editing tool with a wider range of features including watermarking and editing metadata, making it suitable for advanced users. In contrast, PDF Chain excels in form filling and image extraction, targeting users who need simpler, more straightforward PDF manipulation.