Merging several PDFs into one file keeps related pages together, whether you are combining scanned receipts, a multi-part report, or signed forms. You can do it with built-in tools on most computers or with dedicated software.
What you'll need
- The PDF files you want to combine
Step by step
- Gather your filesPut all the PDFs you want to join in one folder and rename them in the order you want, such as 1, 2, and 3, so they are easy to arrange.
- Merge on a Mac with PreviewOpen the first PDF in Preview, show the sidebar thumbnails, then drag the other PDF files into the sidebar where you want them to appear.
- Merge on WindowsWindows has no built-in merge tool, so use a trusted app or a reputable online service. Add your files, drag them into order, and choose Merge or Combine.
- Set the page orderDrag the page thumbnails so everything reads in the sequence you want. Remove any blank or duplicate pages before you finish.
- Save the combined fileExport or save as a new PDF with a clear name. On a Mac, use File then Export as PDF so you keep the originals untouched.
Handy tips
- Number your files before you start so drag-and-drop ordering is quick and predictable.
- Keep the original single files until you confirm the merged version looks right.
- If the combined file is large, look for a compress or reduce file size option so it is easier to email.
Heads up
- Free online merge tools upload your files to a server, so avoid them for confidential documents and use offline software instead.
FAQ
Can I merge PDFs without installing software?
On a Mac, Preview handles it with no extra download. On Windows there is no built-in tool, so you need an app or an online service unless your PDF reader offers a combine feature.
Will merging reduce the quality of my pages?
Merging itself does not lower quality. Quality only drops if you also choose a compress option, which shrinks images to reduce the file size.
How do I reorder pages while merging?
Most tools show page thumbnails you can drag into the order you want. Arrange them before saving, and delete any pages you do not need.