An open source PDF editor is a software application that allows users to create, edit, and manipulate Portable Document Format (PDF) files. Unlike proprietary PDF editors, open source PDF editors are freely available and their source code is accessible to the public.
Open source PDF editors are becoming increasingly popular as they offer a number of advantages over proprietary software, including lower cost, greater flexibility, and improved security. One of the most significant historical developments in the field of open source PDF editing was the release of the PDFium project by Google in 2010.
