Add Watermark
to your PDF
Stamp an image or text over your PDF in seconds. Choose the typography, transparency and position. Processed locally in your browser.
Drag & Drop PDF file
or click to browse from your device
How PDF Watermarking Works
Protect copyright and mark document statuses in 3 simple steps.
Upload PDF
Select the PDF document you want to watermark from your device.
Customize Design
Type text or upload a logo. Configure opacity, font size, rotation angle, and grid layout spacing.
Apply & Save
Process watermark stamp coordinates locally and download your protected PDF instantly.
Secure & Customized Watermarking
Protect intellectual property, label drafts, or embed corporate logos without sending files online.
Tiling & Mosaic Overlays
Overlay watermarks in a repeating 3x3 grid across the entire page to block unauthorized editing.
Interactive Preview Canvas
Witness typography, angle, margin, and transparency adjustments reflect instantly in real-time.
100% In-Browser Rendering
All embedding and assembly operations execute inside local memory cache. Secure and instant.
Frequently Asked Questions
Common queries regarding client-side PDF watermarking.
Q.How do I add a watermark to my PDF?
Upload your PDF file above. Choose either a text watermark (type custom text) or an image watermark (upload a graphic logo). Adjust the opacity, size, angle, and grid position, then click Apply Watermark to save.
Q.Are the watermarks permanently embedded?
Yes. The tool embeds watermarks directly into the PDF's logical content stream layers, making them permanent and extremely difficult to strip using standard readers.
Q.Is it safe to watermark my sensitive files on CanvaTools?
Absolutely. All layout drawing, transparency blending, and document compiling run client-side in your browser sandbox. Your files never touch external clouds, guaranteeing 100% privacy.
Q.Can I tile watermarks across the entire page?
Yes. Our advanced options allow you to tile text or logo patterns diagonally across the entire page layout, maximizing visual copy protection.