Add a Watermark to a PDF Online — Free
Stamp text watermarks onto any PDF in seconds. Free, no signup to start, and your files never leave your device.
Upload a PDF
or drag and drop
How to add a watermark to a PDF
Select or drag in the PDF you want to watermark.
Type your watermark text and adjust the style and position.
Click Apply and your watermarked PDF downloads automatically.
Private by design
Your files are watermarked right in your browser. Nothing uploads to a server, so nobody — including us — ever sees them.
Fast and free
No account needed to start, no watermarks, no waiting in a queue. Done in seconds.
Works everywhere
Runs on any modern browser — Windows, Mac, phone, or tablet. Nothing to install.
Frequently asked questions
Is it safe to watermark PDFs online?
With StylusPDF, yes — because nothing goes online. The watermarking happens entirely inside your browser on your own device, so your documents are never uploaded, stored, or seen by anyone else.
Can I control how the watermark looks?
Yes. You can set the text, size, opacity, and position so the watermark suits your document.
Is adding a watermark free?
Yes. You can add watermarks for free without creating an account. A free account gives you more daily downloads, and StylusPDF Pro removes all limits.
Will the watermark appear on every page?
Yes. Your watermark is applied across the document so every page is marked.
Do I need to install anything?
No. StylusPDF runs in your web browser. There’s nothing to download or install, and it works on any device.