Add PDF Watermark
Add text watermarks to every page of a PDF. Control font, size, opacity, rotation and position. 100% browser-based.
Drag & Drop PDF here
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v2.4.0-Stable∞
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0ms
Latency
100%
Browser-Based
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Nothing uploaded — all browser-based.
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Use immediately, no account needed.
All Pages
Watermark applied to every page.
Knowledge Base
Frequently Asked Questions
Can I add a watermark to every page of a PDF?↓
Yes. The watermark applies to all pages by default. Customize text, font size, opacity, rotation angle and position for each placement.
Can I make a watermark semi-transparent?↓
Yes. The opacity slider from 10% to 100% controls transparency. 20-30% opacity is typical for watermarks that are visible but not distracting.
Can I position the watermark anywhere on the page?↓
Yes. Choose center, diagonal (across the full page), or specific corner positions. Diagonal placement is the most tamper-resistant option.
Is adding a PDF watermark free?↓
Yes, completely free. pdf-lib runs in your browser with no file size limits or signup requirements.