About Add Watermark to PDF
Stamp custom text watermarks onto every page of your PDF. Configure font size, color, opacity, and position (center, corners). Perfect for marking documents as CONFIDENTIAL, DRAFT, or adding your brand. All processing is private and offline.
How to Add Watermark to PDF
- Upload your PDF document.
- Type your watermark text (e.g., 'CONFIDENTIAL', 'DRAFT').
- Configure font size, opacity, color, and position.
- Click 'Process Files' to stamp watermarks on every page.
- Download your watermarked PDF.
Frequently Asked Questions
Q.What fonts are available for watermarks?▼
PDFDock uses Helvetica Bold — a universal, professional font supported by all PDF readers worldwide.
Q.Can I adjust watermark transparency?▼
Yes. Set opacity from 0.1 (very faint) to 1.0 (fully solid) to control visibility.
Q.Does this support image watermarks?▼
Currently text-only. Image watermark support is planned for a future release.
Q.Where can I position the watermark?▼
Center (with 45° tilt), top-left, top-right, bottom-left, or bottom-right corners.
Q.Are watermarked PDFs compatible with all readers?▼
Yes. The watermark is embedded as standard PDF text — compatible with Adobe Acrobat, Preview, Chrome, and all PDF readers.
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Your Privacy is Guaranteed
Watermark layouts and fonts are rendered inline over the existing page nodes inside the browser.PDFDock operates 100% offline after the initial page load. We have no backend servers, no database, and no file storage. Your documents are processed entirely in your browser's memory and are never transmitted over the network. This makes PDFDock inherently compliant with GDPR, CCPA, HIPAA, and other global privacy regulations.