How to use Merge PDF
- Select your files in the PDF files field. Two files are the minimum.
- Drag the file rows, or use Up and Down, to set the page order.
- Select Merge and wait while the pages are copied.
- Download merged.pdf and open it to check the page order.
Example: Merge PDF
Combine a two-page PDF with a three-page PDF.
Options
- PDF files
- The order of the list is the order of the pages, and the pages of one file stay together. A two-page cover placed first contributes pages 1 and 2.
- Output file name
- Names the download. The default merged becomes merged.pdf; the .pdf extension is added automatically.
Supported inputs and limits
Where your input is processed
This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.
What a merged PDF keeps and what it leaves behind
Pages and their content move across, so the merged document looks like its sources. Everything that describes the document as a whole does not. A bookmark points into a page tree that no longer exists, a form field definition belongs to one document, an embedded attachment has no place in the new container, and a digital signature covers the exact bytes that a merge rewrites. Treat a merged file as a new document and check anything you rely on by hand.
Questions about Merge PDF
Does merging keep my bookmarks and form fields?
No. Bookmarks, embedded files, form fields and digital signatures describe a document as a whole and are not copied into the merged file. The result tells you which inputs had them so you can rebuild the ones that matter.
Why was my PDF refused as password protected?
An encrypted file cannot be read or counted, and quietly stripping the password would change your document. Remove the password in your PDF reader, save the unprotected copy, then merge that.
What order do the pages end up in?
The order of the file list. Drag a row to a new position, or use its Up and Down buttons. Each file contributes all of its pages before the next file starts.
How large will the merged file be?
It depends on the inputs. Nothing is re-encoded, so the total is the copied page content plus a new document structure. The result reports the merged file size.