Will it cover my content?

Only as much as you choose. Lower the opacity for a faint background stamp, or raise it for a bold notice. The text is semi-transparent so the page stays readable.

Does stamping the watermark touch a server?

No. Both the live preview and the final stamp are drawn with pdf-lib in this tab, nothing about the file is sent anywhere to produce either one.

Watermark PDF

No upload · runs in your browser

Drop a PDF to watermarkYou'll position the watermark on a live previewSelect files No upload · processed locally · auto-deleted

How it works

How to watermark a PDF with a live preview

Drop a PDF and position your watermark on a live preview of the first page. Drag it where you want, resize its width and height with the corner handle, set the opacity, angle and color, then stamp it across every page.

Because the preview and the watermark are both rendered in your browser, the document is never uploaded. What you see in the preview is exactly what gets saved.

FAQ

Yes. Drag the watermark on the preview to move it, and drag the corner handle to resize its width and height freely. What you see is exactly what gets stamped on every page.

Keep going