Tools
PDF Stack Merge
Stamp a single-page PDF onto every page of a base PDF — letterheads, watermarks, signature blocks. Runs in your browser; nothing is uploaded.
Base PDF
Multi-page OK
Click to upload
drag-drop, or paste (⌘V)
Stack layer (top)
Single page · drawn on top of every base page
Click to upload
drag-drop, or paste (⌘V)
PDF only · Base up to 25 MB · Stack up to 10 MB · If the stack PDF has multiple pages, only page 1 is used.