Organize
Merge PDF
Combine up to 100 PDFs into one file, in the order you choose. You can also pick, reorder and rotate individual pages before you merge.
Runs on your device: nothing is uploaded unless you choose it
Drag and drop here
PDFUp to 100 PDFs, 50 MB each and 100 MB in total
What Merge PDF does
Merge PDF joins the pages of several documents into a single PDF. Every page keeps its original size and image resolution, so a US Letter contract followed by an A4 appendix comes out exactly as it went in.
Everything happens on your device: the thumbnails, the page-order preview and the merge itself all run in your browser, so your PDFs are not uploaded. If your device runs out of memory on a very large job, you are asked before anything is sent to our server.
Each file's bookmarks, links between its pages and attached files come along, in the order you merge them; links and bookmarks to pages you leave out are removed. Filled-in form fields become ordinary page content.
Is this the right tool?
Good for
- Sending one attachment instead of five: application form, ID scan, bank statement and cover letter.
- Putting a signature page or appendix back into the report it belongs to.
- Combining a year of monthly invoices or statements into one file.
- Building a packet from selected pages of several documents.
Not the right tool for
- Reordering or deleting pages inside a single PDF. Organize PDF is built for that job.Organize PDF
- Combining photos or scans saved as JPG or PNG. Turn them into a PDF first.JPG to PDF
- Forms that must stay fillable. Merging turns field values into fixed text; add new fields to the merged copy afterward.Edit PDF
How to merge PDF files
Add your PDFs
Select Choose PDF files or drop them on the page: up to 100 PDFs, 50 MB each and 100 MB in total.
Put them in order
Drag a document to a new position, or open its Move menu and type a position number. Sort A–Z orders the list by file name.
Choose pages
Select Choose pages on a document to include only some of its pages, type a range such as 4, 1-2 to set their order, or rotate sideways pages.
Merge and download
Look through Preview page order, name the file under Output file name, and select the Merge button, which shows how many files it will join. Then use Preview merged PDF and Download PDF.
Worked example
A rental application in one file
Say a property manager asks for one PDF containing your application form, two pay stubs, a bank statement and a photo ID. The bank statement runs to 12 pages, and only the first three were requested.
Add all five files and drag the application form to the top. On the bank statement, select Choose pages and enter 1-3. If the ID scan is sideways, open Choose pages on that file and rotate it.
Preview page order shows the whole packet in sequence. Name the file, select Merge 5 PDFs, and download one attachment that reads top to bottom.
Tips for a better result
- Name files 01, 02, 03 before you add them and Sort A–Z puts them in order in one click.
- Add page numbers after merging, not before, so the numbering runs through the whole document.
- If the merged file is too big to email, send it to Compress PDF using the links under the download button.
Merge PDF: questions and answers
Does merging PDFs reduce their quality?
No. Pages are copied into the new file as they are, with the same dimensions and image resolution. The merged file is roughly the sum of its parts, so if size matters, compress it afterward.
Can I merge PDFs with different page sizes or orientations?
Yes. Each page keeps its own size and orientation, so portrait and landscape pages, or US Letter and A4, can sit in the same file.
What happens if one of my PDFs is digitally signed?
A digital signature certifies one exact file, so it cannot survive being combined with other pages. Merge PDF points out the signed document and asks you to confirm first. Keep the signed original and treat the merged file as a reading copy.
Why was one of my files flagged when I added it to the merge?
The usual causes are a password on the file, a damaged file, or a dynamic XFA form, an older form format that cannot be rewritten safely. The card for that file says which applies. Unlock or repair it, or use Replace PDF to swap in another copy.