Can I add an image as a watermark?

Yes! Switch to "Image Watermark" mode and upload a PNG or JPG logo. It will be centered on every page.

How do I make the watermark semi-transparent?

Use the Opacity slider. 30% is typical for document watermarks, 10-20% for subtle branding.

Can I tile the watermark across the entire page?

Yes. Set Position to "Tile (repeat)" to stamp the watermark in a repeating grid pattern.

Is my PDF sent to a server?

No. Watermarking runs entirely in your browser using pdf-lib. Your files stay private.

What text styles can I use?

Text watermarks use Helvetica Bold. You can control size (12–120px), color, opacity, and rotation angle.

Add Watermark to PDF Free Online - Text & Image Stamps

How to Use Watermark PDF

1
Upload your PDF file.
2
Choose "Text Watermark" or "Image Watermark".
3
Configure text, size, color, opacity, rotation, and position.
4
Click "Download Watermarked PDF".
5
Verify all pages have the watermark as expected.

About Watermark PDF

Stamp a custom text or logo watermark onto every page of your PDF with our free tool to add watermark to PDF online — completely in your browser with no server upload needed.

Key Features

Text Watermarks: Add custom text with control over font size, color, opacity, and rotation angle.
Image Watermarks: Upload a PNG or JPG logo to use as an image watermark centered on every page.
Flexible Positioning: Place the watermark at the center, corners, or tile it in a repeating grid across the page.
Opacity Control: Adjust the opacity slider — 30% is typical for document watermarks, 10-20% for subtle branding.

Who Is This For?

Ideal for businesses protecting documents, lawyers watermarking contracts, photographers protecting proofs, and anyone who needs to mark PDFs as confidential, draft, or branded before sharing.

Privacy & Security

Runs 100% in your browser using pdf-lib — your files stay private, no signup required.

Watermark PDF