Upload your PDF
Select the PDF to watermark.
Enter watermark text
E.g. "CONFIDENTIAL" or your company name.
Set opacity
From subtle ghost (0.1) to bold stamp (0.7).
Download
Save the watermarked PDF.
The watermark is applied diagonally across the centre of each page — the standard position for document protection watermarks.
0.2–0.3 gives a subtle ghost effect; 0.5–0.7 gives a bold visible stamp. Default is 0.3.
Text-only watermarks are supported. Image watermarks are on the product roadmap.
The watermark is baked into the PDF. The "Remove Watermark" tool can reverse text watermarks added by Zavy.