How to merge PDF files
Combine two or more PDF files into a single document, in exactly the order you want. Merging PDFs is handy for joining chapters, invoices, scanned pages or contracts into one tidy file — and with pdfcdf it all happens in your browser, so your files stay private.
Try Merge PDF now →Step by step
- 1Open the Merge PDF tool and drop in the PDF files you want to combine.
- 2Drag the files to set the order — they combine from top to bottom.
- 3Click “Merge PDF” and download your single, combined PDF.
FAQ
Can I change the order of the files before merging?
Yes — drag any file up or down in the list (or use the arrows). The final PDF follows the top-to-bottom order you set.
Is there a limit on how many PDFs I can merge?
No fixed limit. Because merging runs on your own device, you can combine as many files as your browser can comfortably handle.
Does pdfcdf add a watermark to the merged PDF?
No. The merged file is exactly your pages, combined — no watermark, no branding, no page limits, and no sign-up to remove anything.
Can I merge PDFs on my phone or tablet?
Yes. The merge tool works in any modern mobile browser on iPhone, iPad and Android — open the page, add your files and download the combined PDF. No app to install.
Will merging reduce the quality of my PDFs?
No. Pages are copied into the new document as-is rather than re-rendered, so text stays sharp and images keep their original quality. Pages with different sizes are kept at their own size.
Is pdfcdf free to use?
Yes. Every tool on pdfcdf is completely free, with no account, no watermarks, and no limits on how many files you process.
Are my files safe? Do they get uploaded?
Your files never leave your device. Every tool runs entirely in your browser, so your documents are processed locally and are never uploaded to a server or seen by anyone.
Do I need to create an account or sign up?
No. pdfcdf works instantly with no sign-up, no email, and no software to install — just open the tool and go.
Does it work on mobile phones and tablets?
Yes. pdfcdf runs in any modern browser on phones, tablets, Mac, Windows and Linux — nothing to download.
Ready to merge pdf?
Open Merge PDF →