There's a super-easy free tool you can use.
If you ever find yourself with the need to combine several PDFs into one
single file, you may be immediately frustrated. It's not immediately obvious
how to achieve what you're trying to do.
Luckily, Adobe, the creator of the PDF, offers a super-simple and free
online tool that will help you combine your files in a matter of minutes.
Adobe's free online tool to combine PDFs offers a clean and simple interface
that's easy to understand. The first time you use the tool, you don't need
to sign in, and you can just select to download your merged file when you've
completed the process.
If you want to use the tool again, you will need to sign in with your
Google, Facebook, or Apple account, or by creating an account with your
email address and a password. When you do sign in, you get the additional
option to share your file by either generating a link or emailing it to
others.
To get started, you need to get your PDF files into the main "Combine
Files/Merge PDFs" box you will see at the top of the page. You can do this
by dragging and dropping your PDF files into the box, or you can click the
"Select Files" button to choose files you have saved on your computer.
Once you've uploaded your PDF files, it's just a matter of clicking the
"Merge/Combine" option toward the top right of your screen. If you're signed
in, you'll need to give the new file a name before the "Combine" button is
clickable. After you've completed the combine process, you can download or
share your new file.
From the completed merge screen, you'll also see a menu on the right-hand
side of the page. This menu gives you further options to edit your file,
including the ability to reorganize the pages, split the PDF, edit it,
convert it into an alternative file format such as a JPEG or Word file, and
to add a comment. Simply click on each option to make it happen.
Credit: mashable.com
