Stamp a text or image watermark across every page of a PDF — like “CONFIDENTIAL”, “DRAFT”, or your logo — right in your browser. It all happens on your own device, so there’s no upload and your document stays private.
Watermark a PDF nowMost free online tools do this by uploading your file to their servers. This one doesn’t: it runs entirely in your browser, and the page ships with a strict security policy that blocks every outbound network request, so your file physically cannot leave your device. No account, no email, no upload, no watermark.
Add text (with a choice of colour) or upload a PNG/JPG logo. Control the position — diagonal, centred, tiled, top, or bottom — plus the opacity and size, so the watermark is visible without hiding your content. It’s applied to every page.
Text watermarks use a standard PDF font. There are no watermarks from us on the output (the only watermark is the one you add), no limits, and everything runs offline once the page loads.
No. The watermark is applied entirely in your browser and your file never leaves your device.
Yes. Upload a PNG or JPG image and position it with the opacity and size you want.
Yes — diagonal, centred, tiled, top, or bottom, with adjustable opacity and size.
No. The only watermark on the output is the one you choose to add.