Overlay two PDF files by placing one on top of the other as transparent layers. Perfect for combining templates with content.
PDF overlay (also called PDF stamping) places the content of one PDF on top of another. This is different from merging: both PDFs occupy the same page position.
Common uses include adding a letterhead template to a content PDF, combining form data with a blank form, or adding a background to pages.
Upload the base PDF and the overlay PDF you want to place on top.
Choose how the overlay is positioned: centered, top-left, or custom offset.
Download the PDF with both documents combined as layers.
Your files never leave your device. Everything runs directly in your browser using JavaScript — no server, no cloud, no data collection. Your documents stay private.
Merge appends pages sequentially. Overlay places pages on top of each other on the same page.
Yes, you can set the opacity of the overlay layer.
The overlay is applied to matching pages. Extra pages from the base PDF remain unchanged.
Yes! Upload your letterhead as the overlay PDF and your content as the base PDF.
Yes — PDFInOne is a completely free alternative to iLovePDF, Smallpdf, PDF24, and Adobe Acrobat online. Unlike those services, PDFInOne processes everything locally in your browser: no file uploads, no account required, no file size limits, and no watermarks.