PDF Watermark Stamper
Stamp custom text or image watermarks across PDF documents. Customize text, font size, opacity, rotation angle, and page ranges.
🔒 Runs in your browser · No upload · No signup
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Frequently Asked Questions
Will watermarking re-compress or degrade text in my PDF? ↓
No. The watermark layer is injected as a native vector object directly into the existing PDF structure without re-rendering or rasterizing pages, preserving 100% of the original document sharpness.
Are my confidential documents uploaded to any remote server? ↓
Never. The entire stamping process runs 100% inside your local browser via pdf-lib. Your documents and sensitive files never leave your computer.
Can I apply watermarks to specific page ranges? ↓
Yes, you can choose "All Pages", "First Page Only", or specify custom ranges like "1, 3-5".
Can I use common stamps like CONFIDENTIAL or DRAFT? ↓
Yes! Convenient 1-click presets are provided for CONFIDENTIAL, DRAFT, COPY, SAMPLE, and APPROVED.