While you can pay for subscriptions and licenses, the best free PDF editor offers all the core tools you need to create and manage documents without paying anything. My team and I have extensively ...

Some of these apps do certain things better than others, so the best PDF editor ... PDF documents, combine multiple files into a PDF, annotate PDFs, add security features, free OCR, and more.

There are two easy ways to merge PDF files—one using Adobe Acrobat Online (free) and another using Adobe Acrobat Pro (for more advanced features). Both will combine PDF files into one.