Add Watermark to PDF

Protect your documents with custom text or image watermarks. All processing happens locally in your browser.

Select PDF File

or drop file here

Supports single PDF • 100% Local process in your device

How to Add Watermark to PDF

Protect your intellectual property in three simple steps. Our real-time preview lets you see exactly how the final result will look.

1

Upload your PDF

Click the Select PDF File button or drag and drop your document. Your file stays on your device—nothing is uploaded to any server.

2

Customize & Preview

Choose Text or Image watermark. Adjust opacity, rotation, scale, and density. Watch changes appear instantly on the page previews.

3

Apply & Download

Once satisfied, click Apply & Download PDF. Your watermarked PDF will be generated instantly.

Why Choose CedarPDF for Watermarking?

100% Private & Secure

CedarPDF processes everything locally in your browser. Your documents never leave your device, ensuring complete confidentiality.

Real-Time Visual Preview

Don't guess how your watermark will look. Our tool renders a live preview on every page as you adjust settings.

Professional Customization

Control every aspect including opacity, rotation, font size, color, scale, and density. Create subtle patterns or bold stamps.

Text or Image Support

Need a simple text stamp? Or a company logo watermark? Switch between modes instantly without reloading the page.

When Do You Need to Add Watermarks?

From students to professionals, CedarPDF helps people protect their documents effortlessly.

For Students & Researchers

Protect Academic Work

  • Add "DRAFT" watermarks to thesis drafts before sharing with advisors.
  • Watermark original research to protect intellectual property.
  • Best of all: Completely free for unlimited student use!
For Professionals & Business

Secure & Professional Documents

  • Add "CONFIDENTIAL" watermarks to sensitive contracts or financial reports.
  • Watermark internal documents before distributing to external partners.
  • Best of all: Your confidential documents never leave your computer.
For Daily Life & Others

Protect Creative Works

  • Photographers: Add copyright watermarks to photo portfolios.
  • Artists: Protect digital artwork from being stolen.
  • Best of all: Works perfectly on mobile phones and tablets.

Frequently Asked Questions

Can I use my own logo as a watermark?
Yes! Select the "Image Watermark" tab and upload your PNG or JPG logo. You can then adjust its scale, rotation, opacity, and density just like a text watermark.
Can I adjust the transparency of the watermark?
Yes! Use the "Opacity" slider to make it faint (for background use) or solid. The preview updates instantly.
Is my document safe? Do you store my files?
Your data is 100% safe. CedarPDF runs entirely in your web browser. Your PDF files never leave your device.
Is the watermark permanently embedded?
Yes. Once you click "Apply," the watermark is flattened directly into the PDF content and cannot be easily removed.