Watermark PDF
WEBAdd a text or image watermark to every page of a PDF — free and right in your browser. Nothing is uploaded.
What is the Watermark PDF tool?
Watermark PDF stamps a text or image watermark across every page of a PDF — a "CONFIDENTIAL" or "DRAFT" label on an internal document, a company logo on a report before it goes out, or a subtle tiled mark to discourage unauthorized copies. Everything runs inside your browser, so the document you're watermarking never leaves your device.
Choose a text watermark (with your own wording, color and rotation angle) or an image watermark (your logo or stamp), then control opacity so it sits behind the content without hiding it, and choose whether it repeats as a tiled pattern across the page or appears once. The watermark is flattened permanently into the exported file — it's part of the page from then on, not something that can be dragged off or deleted by whoever opens the PDF next.
Because processing happens on-device, watermarking works just as well from a phone as from a desktop — open the file, set your watermark, and download the stamped PDF straight to your device.
How to use the Watermark PDF
- Open the PDF you want to watermark — drag it in or pick it from your device.
- Choose text or image, and enter your wording or upload your logo.
- Adjust opacity, color, angle and whether it tiles across the page.
- Export the watermarked PDF — the watermark is flattened right in your browser; nothing is uploaded.
- Download the finished file with the watermark on every page.
Frequently asked questions
Can I use my own logo as a watermark?
Yes. Alongside a text watermark you can upload an image — your company logo or a custom stamp — and it's applied to every page the same way a text watermark is.
Is the watermark permanent, or can someone remove it?
Once exported, the watermark is flattened directly into each page's content — it's not a separate layer that a viewer can toggle off or drag away in another PDF tool.
Can I control how visible the watermark is?
Yes. Opacity, color, rotation angle and whether it repeats as a tiled pattern (rather than appearing once) are all adjustable, so you can make it subtle or impossible to miss depending on the document.
Is it safe to watermark a PDF online?
Yes — with Carbide the whole process runs in your browser, so the document and your logo/watermark text are never uploaded to a server, unlike most online watermarking tools.
Does watermarking affect the rest of the PDF's content?
No. The watermark is added on top of each page's existing content — the original text, images and layout are left untouched underneath it.