You can use a free desktop app, a website, or run a command from Command Prompt to combine the files. Windows 11 doesn’t have a built-in option to merge PDF files.

Learn how to merge multiple CSV files into one Excel sheet. You can combine or join more than one CSV file into one Excel Worksheet.

You can combine multiple PDF files into a single, easy-to-share document using simple software on your Mac computer or Windows PC. Here's how.