Can I use a logo image as a watermark?

Currently text only. Image watermark is on the roadmap.

Are my PDFs uploaded?

No. pdf-lib runs in your browser.

Can the watermark be on top vs behind content?

Currently drawn on top. Background watermark is on the roadmap.

PDF Tools

Add Watermark to PDF

Add a text watermark across every page of a PDF. Custom color, size, opacity, rotation.

Drag & drop files, or click to browse

PDF · max 25 MB

Files processed in your browser

Your files never leave your device. No upload, no servers.

About Add Watermark to PDF

Add Watermark to PDF stamps text — like "CONFIDENTIAL", "DRAFT", a copyright line, or your name — across every page of a PDF document. Adjustable font size, opacity, rotation angle, and color. Useful for protecting sensitive documents before sharing, marking draft copies, and branding distributed PDFs.