Our online PDF joiner will merge your PDF files in just seconds. Merge & combine PDF files online, easily and free How to combine and merge your files into one PDF: Open Acrobat to combine files: Open the Tools tab and select Combine files. Add files: Click Add Files and select the files you want to include in your PDF. You can merge PDFs or a mix of PDF documents and other files. Arrange and delete content: Click, drag, and drop to reorder files or How to combine and merge your files into one P