How to Merge Multiple PDF Files into One
Combine PDFs in the order you choose, entirely in your browser.
Merging PDFs — a resume and a cover letter, or several scanned pages — is one of the most common PDF tasks. Here's how to do it without installing anything or uploading your documents to a service you don't know.
Add your files
Drop two or more PDFs onto Merge PDF, or choose them from a file picker. Each one appears in a list with its file size, keeping every page from every file — nothing is dropped or altered.
Put them in the right order
The files merge in the order they're listed, top to bottom — all of the first file's pages, then all of the second's, and so on. Use the up and down arrows next to each file to rearrange them before merging; there's no need to re-add anything to fix the order.
Merge and check the result
Click 'Merge PDFs' and the combined document appears in an inline preview, so you can page through it and confirm it looks right before downloading.
What merging can't do
Merging only joins pages — it can't merge a password-protected or encrypted PDF, since the tool can't read its contents. Remove the password with whatever software created it first, then merge as usual.
Merging scans and mixed-size documents
Files do not need to match before merging. Pages keep their own size and orientation in the combined document — a portrait contract page and a landscape spreadsheet page can live in the same PDF, each exactly as it was. Nothing is re-rendered or downscaled, so scanned pages keep their original quality. If you need uniform pages, that is a page-editing job, not a merging one — merging deliberately changes nothing except joining the documents.
A naming trick for large batches
When you are merging many files, the merge order comes from the list — so make the list easy to get right. Rename the files with number prefixes before you add them (01-intro.pdf, 02-contract.pdf, 03-appendix.pdf) and they will sort in the order you intend when you select them together. It is far faster than dragging a dozen files into order one arrow-click at a time, and it prevents the classic mistake of an appendix landing in the middle of the document.
What to do after merging
A merged file is often the start, not the finish. If it is too large to email, run it through Compress PDF. If the combined document needs page numbers, add them to the merged file in one pass rather than numbering each part separately. And if it is a contract or application, the merged file is the one to sign — signing before merging would bake signatures into the middle of a longer document.
Quick tips
- Reorder before merging — there's no reorder step afterwards.
- Nothing is uploaded; the whole merge happens in your browser.
- Want just some pages instead of whole files? Use Split PDF's page-range mode first, then merge the extracts.
- If the merged file is too big to email, run it through Compress PDF next.
- Sanity-check the result: the pages of the parts should add up to the page count in the merged preview.