Watermark PDF Online
Add a custom text watermark to your PDF — CONFIDENTIAL, DRAFT, your company name. Control the color, opacity, position, and rotation.
How to Add a Watermark to a PDF
Upload Your PDF
Drop your PDF onto the upload area or click to browse. The file is processed entirely in your browser.
Customize Your Watermark
Type your watermark text, pick a color and opacity, set the font size, rotation, and position using the sidebar controls. A live preview shows how it will look.
Download Watermarked PDF
Click Add Watermark and download your PDF instantly. No email or signup required.
Frequently Asked Questions
Can I add a watermark to specific pages only?
Yes. Under "Apply To" in the sidebar, choose Custom and enter page numbers or ranges, e.g. "1, 3, 5-8". Only those pages will receive the watermark.
Can I remove a watermark added with PDFForge?
Watermarks added by PDFForge are embedded in the page content as a text element. They can be removed with advanced PDF editing tools, but are not easily removable by casual users.
What text can I use as a watermark?
Any text up to 60 characters — CONFIDENTIAL, DRAFT, your company name, a copyright notice, or any custom message.
Can I control the watermark transparency?
Yes. The Opacity slider in the sidebar lets you set transparency from 5% (nearly invisible) to 100% (fully opaque). Most professional watermarks use 20–40% opacity.
Will adding a watermark affect PDF quality?
No. The watermark is added as a text layer in the PDF — it does not re-encode images or degrade existing content quality.
Is my PDF safe to watermark online with PDFForge?
Completely safe. All processing runs locally in your browser using pdf-lib (WebAssembly). Your file is never sent to any server.