Add Watermark

Add Watermark is a free browser-based tool that helps you add text or image watermarks to pdf files with customizable opacity, rotation, and placement. It is part of ToolsMonk's pdf tools collection, so you can finish the job without downloading software, creating an account, or jumping between multiple websites.

This tool is especially useful for workflows such as stamping confidential or draft across internal documents before sharing, adding a company logo watermark to proposals, reports, and proofs, and marking copies as copy or sample to deter unauthorised reuse. Because it runs directly in your browser, you can use it on desktop, tablet, or mobile while keeping the process fast and easy for one-off tasks as well as repeat work.

Add Watermark is also a strong fit for people searching for watermark pdf, add watermark, and pdf watermark, because it combines a simple interface with instant results and privacy-friendly processing.

Add Watermark stamps a text or image mark onto every page of a PDF — the standard way to label documents as confidential, draft, or copyrighted, or to brand them with a logo. You choose the content, then fine-tune how it looks and where it sits.

Text watermarks include ready-made presets (CONFIDENTIAL, DRAFT, COPY) or your own wording; image watermarks let you drop in a logo, where a transparent PNG gives the cleanest result. Opacity controls how subtle or bold the mark is, rotation sets the angle, and five placement modes — including a page-filling tiled pattern — decide where it lands.

Everything runs locally with pdf-lib, so your document is never uploaded. That keeps internal and confidential files private, and there's no ToolsMonk branding added to your output and no usage cap.

Because a watermark becomes part of the rendered page, always keep an original un-watermarked copy if you might need a clean version later. For strong anti-copy marking, the tiled mode at moderate opacity and a diagonal angle is the most effective combination.