Read this guide to learn how to combine multiple files into one PDF file using a free online editing tool as well as downloadable PDF editing software.

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).

PDF Converter Pro doesn’t stop at simple conversions. You can merge multiple PDFs into one document, split files into individual pages, or compress large PDFs to free up space.