Do my PDF files get uploaded anywhere?
No. The merge runs entirely in your browser on your own device. Your files are never sent to a server, we never see them, and nothing is stored. That makes this safe for confidential construction drawings, NDA documents, and client files, unlike tools that upload your PDF to merge it in the cloud.
Is there a file size or page limit?
There is no hard limit we impose. Because the work happens in your browser, very large sets (hundreds of MB) depend on your computer's memory rather than an upload cap. For everyday merging it is instant; for very heavy multi-discipline drawing sets a desktop tool handles the load more comfortably.
Can I change the order of the files before merging?
Yes. After you add your files, use the up and down arrows to put them in the exact order you want. The merged PDF follows that order, top to bottom.
Is it really free, and is there a watermark?
It is free, with no signup, no email, and no watermark added to your merged file. It is a small thank-you tool from the team behind Ncored.
I work with heavy CAD drawings all day. What about those?
Merging is the easy part. The hard part is opening and marking up a 50-200 MB+ AutoCAD, Revit or ArchiCAD export without your PDF tool freezing on scroll and zoom. That is exactly what we built Ncored for, a fast desktop PDF editor for large construction drawings on Windows and Apple Silicon Mac. There is a free 14-day trial at ncored.com.