How to Merge PDF Files Into One Document (Windows, Mac and Online)
Learn how to combine PDF files on Windows, Mac, iPhone and Android, or in your browser. Follow simple steps and merge your documents now.
What Does It Mean to Merge PDF Files?
Merging PDFs combines pages from multiple PDF documents into one output document. The page order depends on the order in which the source files are arranged.
How to Merge PDF Files With MergeImagePDF
Add the PDF files
Open the Merge PDF tool and add the documents you want to combine.
Arrange the files
Move files up or down until the sequence matches the final document you want.
Review the result
Check the file order and keep the originals before creating the combined PDF.
Download the combined PDF
Process the files and download the final document.
Common reasons to merge PDFs
- Combine reports and appendices.
- Combine scanned pages and records.
- Create one attachment from several supporting documents.
Merge PDF vs Split PDF
Merge PDF combines documents. Split PDF separates pages or creates smaller documents from one source PDF.
Merge PDFs on a Mac With Preview
If you would rather not use an online tool, Preview on a Mac can combine PDFs. Open the first PDF, choose View > Thumbnails, and drag pages or another PDF file into the sidebar. Apple explains the steps in Combine PDFs in Preview. The browser method is quicker when you have many files or are not on a Mac.
Tips for the Right Page Order
- Set the order before you merge; the file list order becomes the page order.
- Number your file names (01, 02, 03) so they sort correctly.
- Put scanned pages together and check that they share the same orientation.
- Keep the originals until you have checked the merged result.
Common Problems
A password-protected PDF may not open in the merger, so remove the password first. A damaged download will fail, so fetch it again. Very large files can be slow or run out of memory on a phone, so try a computer. Each file can be up to 50 MB.
Frequently Asked Questions
Does merging change the quality of my PDFs?
No. Pages are copied into the merged file as they are, so text and images keep their quality.
Are my files uploaded when I merge them?
No. The merge tool runs in your browser.
Try it now: Merge PDF — free, in your browser.