Which characters can I use in a text watermark?

The built-in fonts cover Latin letters, digits and common punctuation. Characters outside that range, such as Chinese or emoji, are not available in text mode; use an image watermark for those.

What image formats work for a logo?

PNG and JPG. PNG is recommended because transparent areas stay transparent, so the logo blends with the page.

What does the Tiled layout do?

It repeats the watermark in a grid across the whole page, which is the usual choice for Confidential or Draft stamps. Center places a single large watermark in the middle of the page.

Are my files uploaded to a server?

No. This tool runs entirely inside your browser using JavaScript. Your files are read from your device, processed in memory, and the result is handed straight back to you as a download. Nothing is transmitted, stored or logged, and the page keeps working if you go offline after it has loaded.

Watermark PDF

Stamp text or a logo across every page with custom opacity and angle.

Files never leave your device
Instant, no queue
No upload, no signup
Free, no watermark

Drop your files here

or browse from your device

PDF files · up to 200 MB each · paste with ⌘V / Ctrl+V

Processed on your device, never uploaded

How it works

How to use watermark pdf

Add the PDF files to watermark.

Type the watermark text, or switch to Image and pick a PNG or JPG logo. Adjust size, opacity, rotation and layout.

Click Add watermark and download. The watermark is drawn on every page.

Questions

Frequently asked questions

The watermark is drawn into the page content rather than added as a removable annotation, which makes it hard to strip without specialist tools. It is still not a security feature; for real protection combine it with the Protect PDF tool.