How to use Merge PDFs
Combine PDF files in your chosen order.
- Choose two or more PDFs, reorder the file list, and process. All pages from each file are appended in that order.
- Process the selected files, then inspect the preview, dimensions or warnings.
- Download a new copy and check it before replacing or sharing the original.
How processing works
All pages from the first PDF are copied to a new document, followed by all pages from the next PDF, in the displayed file order.
A quick example
Combine a cover page and a report into one document.
Assumptions, edge cases & limits
- Password-protected PDFs are unsupported.
- Editing invalidates digital signatures; verify forms, links and document features in the exported copy.
- Password-protected PDFs are not supported. Digital signatures will not remain valid after editing.
Questions about Merge PDFs
How do I combine PDFs in a specific order?
Arrange the selected file list before processing. Each file contributes all its pages in its existing order. Use Reorder PDF Pages afterward if you need to move individual pages.
Does merging PDFs keep a digital signature valid?
No. A signature protects a particular document state, and merging creates a different file. Keep the signed originals and do not treat the merged copy as independently signed.
Are my files or inputs uploaded?
Calculation and file processing run in your browser without a processing upload. Downloads go to your device. Choosing a next-step transfer creates a temporary local copy for that workflow. Region preferences are stored separately from tool inputs. See our privacy details.
Can I use this tool for free?
Yes. No signup, subscription or payment is required to use the tool or download its output. File tools have device and size limits; a smaller batch may work better on a phone.
A result or explanation needs correcting? Tell us the tool name and an example.