Watermark PDF
PDF toolNewProStamp a diagonal text watermark across every PDF page.
This tool runs entirely in your browser. Your files never leave your device — nothing is uploaded.
Pro tool
Watermark PDF is part of Tooldrop Pro
Upgrade to unlock Watermark PDF and the rest of the Pro tools. Everything still runs privately in your browser — nothing is uploaded.
Upgrade to ProFrequently asked questions
Does watermarking upload my PDF?
No. The watermark is applied locally with pdf-lib.
Can I change the watermark text?
Yes — set any text, plus its size and opacity.