Add Watermark to PDF Online
Protect your intellectual property by stamping custom text or image watermarks over your document pages.
Choose PDF or drag & drop
Watermark Type:
Watermark Text:
Opacity (0-1):
Stamping PDF layers...
How to Secure Your PDF with a Watermark
When sharing sensitive drafts or copyrighted work, adding a watermark is the best way to prevent unauthorized use. Our **Add Watermark to PDF** tool provide a fast, free, and robust way to stamp your brand directly onto every page.
A Privacy-First Watermarking Solution
At **PDF MASTER TOOLS**, we prioritize your intellectual property. Our watermarking engine runs **100% inside your web browser**. Your document never leaves your machine.
Frequently Asked Questions
Can someone remove the watermark after I add it?
Our tool burns the watermark into the core content layer, making it much harder to remove than standard overlays.
Is the service free for commercial use?
Yes, absolutely. All our tools are 100% free with no limits and no sign-ups.
Will the watermark make my PDF file massive?
Text watermarks add zero size. Image watermarks add size proportional to the source image.
Does this tool work on mobile devices?
Yes. You can protect your documents on any smartphone browser.