PDF Vole is described as 'Small tool to debug and analyze PDF files. You can open a PDF file and analyze its internal structure and content. I started this project to build a tool as I had to debug and analyze PDF files that did not render correctly or were broken in some way' and is an app in the development category. There are three alternatives to PDF Vole for Windows, Linux, BSD, Flathub and Flatpak. The best PDF Vole alternative is PDFedit, which is both free and Open Source. Other great apps like PDF Vole are PoDoFoBrowser and PDFTron PDF CosEdit.
Free (and open source) editor for manipulating PDF documents. GUI version + commandline interface. Scripting is used to a great extent in editor and almost anything can be scripted, it is possible to create own scripts or plugins.
PDF CosEdit is a stand-alone, low-level PDF editor. It is an essential power tool for professionals working with PDF, FDF, and PJTF. Manual editing of PDF files can be extremely difficult or impossible.
