Can I add image watermarks or only text?

Currently, the tool supports text watermarks with customizable opacity, font size, and positioning. Text watermarks are most common for copyright notices, "CONFIDENTIAL" stamps, or company names. For image watermarks (logos), you would need to use dedicated PDF editing software like Adobe Acrobat. Text watermarks are sufficient for most document protection and branding needs.

Will the watermark appear on every page?

Yes. The watermark is applied to all pages in the PDF document uniformly. This ensures consistent branding or protection across the entire document. If you need selective watermarking (e.g., only first and last pages), first split the PDF into sections, watermark the desired pages, then merge them back together using our PDF tools.

Can watermarks be removed from PDFs?

Text watermarks added by overlay tools can potentially be removed with PDF editing software, which is why they are considered "visual deterrents" rather than absolute security. For true document protection, use password encryption (Protect PDF tool) or digital signatures. Watermarks work best for copyright notices, draft stamps, or indicating document status, not for preventing unauthorized use.

Does adding a watermark increase file size significantly?

No. Text watermarks add minimal file size—typically 5-20 KB regardless of PDF length, because the watermark text is stored once and referenced on each page. A 50-page PDF might increase from 2.5 MB to 2.52 MB. Image watermarks (if supported) add more—roughly the image file size multiplied by page count. Text watermarks are extremely efficient.

What opacity should I use for my watermark?

For subtle watermarks that do not obstruct readability: 10-30% opacity (faint, professional). For visible but non-intrusive watermarks: 40-60% opacity (noticeable, balanced). For prominent watermarks (DRAFT, CONFIDENTIAL): 70-90% opacity (bold, attention-grabbing). Experiment based on background color: lighter backgrounds need higher opacity, darker backgrounds need lower opacity. 50% is a safe default.

Can I position the watermark diagonally across the page?

Diagonal watermarks are a common request for "DRAFT" or "CONFIDENTIAL" stamps. Some tools support rotation angles (e.g., 45°). If this tool does not support diagonal placement, position the watermark centered with increased font size to span the page. Alternatively, create a diagonal watermark image externally and use a watermarking tool that supports image overlays.

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How to Add Watermark to PDF

Upload your PDF file
Enter your watermark text
Adjust opacity using the slider
Click "Add Watermark" and download

PDF Watermark Features

Custom Text: Add any text watermark you want
Adjustable Opacity: Control transparency from 10% to 100%
All Pages: Watermark appears on every page automatically
Copyright Protection: Mark documents as your property
Fast Processing: Add watermarks to multi-page PDFs instantly
No Quality Loss: Original document quality preserved

Why Add Watermarks to PDFs?

PDF watermarks provide copyright protection and document tracking. Scenario: You're sharing a design proposal with a potential client. Add "CONFIDENTIAL - Client Name Only" watermark so if they forward it to competitors, the watermark shows it was meant for them specifically.

Common use cases: Protecting copyright on documents, marking drafts as "DRAFT" or "NOT FINAL", adding company branding to reports, labeling confidential documents, tracking document distribution, preventing unauthorized copying, and adding disclaimers to legal documents.

Privacy & Security

All watermarking happens locally in your browser. Your files never leave your device and are never uploaded to servers. The watermarked PDF is generated on your computer—complete privacy guaranteed.

Watermark PDF