How to add a watermark to a PDF
Overlay text like “Confidential”, “Draft” or your name across every page of a PDF. Watermarks help protect documents and mark their status — added privately in your browser.
Try Watermark now →Step by step
- 1Open the Watermark tool and upload your PDF.
- 2Type your watermark text and set the size, angle and opacity.
- 3Click “Add watermark” to download the watermarked PDF.
FAQ
Can I control how faint the watermark looks?
Yes — adjust the opacity so the watermark is bold or subtle, and set the angle and font size to suit your document.
Is pdfcdf free to use?
Yes. Every tool on pdfcdf is completely free, with no account, no watermarks, and no limits on how many files you process.
Are my files safe? Do they get uploaded?
Your files never leave your device. Every tool runs entirely in your browser, so your documents are processed locally and are never uploaded to a server or seen by anyone.
Do I need to create an account or sign up?
No. pdfcdf works instantly with no sign-up, no email, and no software to install — just open the tool and go.
Does it work on mobile phones and tablets?
Yes. pdfcdf runs in any modern browser on phones, tablets, Mac, Windows and Linux — nothing to download.
Ready to watermark?
Open Watermark →