PDFtk Server
OPEN SOURCE
A command-line tool for manipulating PDFs.
About
PDFtk Server is a free and open-source command-line tool for manipulating PDF documents. It allows users to merge, split, rotate, encrypt, decrypt, fill PDF forms, and apply watermarks, offering powerful automation capabilities.
Pricing
Pricing Type
Open Source
Free tier available
Last checked: February 26, 2026