DocuMerger
Merge a page from another PDF onto your document as a watermark or overlay, with a live preview — free.
Letterheads Behind, Stamps on Top
DocuMerger places a page from another PDF behind your content, like pre-printed stationery, or on top of it, like a stamp — with a live preview, page ranges such as 1,3-5 or odd/even, and saved settings you can run from a batch sequence.
Learn more
Try it free in your browser first
These free online tools do the single-file version of what DocuMerger automates in bulk:
Built on the Adobe PDF Library — the same engine as Adobe Acrobat.