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Watermark PDF Document

Stamp custom text watermarks, confidentiality badges, and draft markers across your PDF pages.

Drag & drop a PDF file here

or click to browse from your device

Watermark stamping executes entirely inside local browser RAM. Files never leave your computer or phone.

How to Watermark a PDF Online

Choose the PDF document from your device.

Type your watermark text, angle, opacity, and color palette.

Download your stamped watermarked PDF document instantly.

Yes! You can choose transparency levels (from 15% to 50%), text rotation (-45° diagonal or horizontal), and custom font colors.

Never. All watermark stamping runs 100% locally in your browser memory using PDF-Lib.

Yes, the watermark is uniformly centered across all pages of your PDF document.