Free Add Watermark

Type your watermark text (e.g. "CONFIDENTIAL") in the settings panel, adjust opacity, font size, rotation angle, and position, then upload your PDF and click "Add Watermark." The stamp is applied to every page.

Yes - upload a PNG using the "Watermark image" option. The image is stamped across every page at the opacity, size, and position you set. If you upload both a text and an image, the image takes priority.

The watermark is baked into the PDF page content, not stored as a removable annotation, so standard PDF editors can't strip it cleanly. For legally binding protection, combine it with password protection.