Add watermark

Add text or image watermarks to PDF documents.

Choose a PDFor drop it here

Works with one PDF. The mark goes on every page.

About Add watermark

Add Watermark puts text or an image mark on PDF pages, with control over position, color, size, and opacity, for draft labels and ownership marks.

Runs entirely in your browser. Your files never leave your device.

1.Start from the final PDF and decide whether a line of text or a logo is the right mark.
2.Set the wording, placement, size, color, and opacity, watching the preview as you go.
3.Export and check a light page, a dark page, and an image-heavy one to see the mark reads without burying anything.

What opacity should a watermark be?

The lowest one you can still read, on screen and on paper. A busy page usually needs more than a mostly white one.

Does a watermark prove a document is genuine?

No, it is a label. Use a certificate-based digital signature when someone has to verify who signed it and that nothing changed since.