Add Watermark to PDF Files

Add Watermark delivers exactly what its name promises, add text or image watermarks to pdf files with customizable opacity, rotation, and placement, fast and free. Because it belongs to ToolsMonk's pdf tools collection, the whole workflow happens on a single page instead of being spread across separate apps or websites.

People reach for it most often when they need 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. With nothing to install, an unexpected one-off job takes no longer to start than your regular routine.

Add Watermark is designed for people who want a practical, privacy-friendly workflow with instant results inside the larger ToolsMonk library.

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, 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.