Apply a repeating text or image watermark across the pages of a PDF - DRAFT, CONFIDENTIAL, a company mark, or anything else. You control the rotation, the opacity and how densely the mark is tiled across the page. A watermark makes the status of a document obvious on every printed copy without touching the content underneath.
Treat it as a visual marking, not a security control. It is drawn into the page content and takes effort to strip, but it is not encryption. If the document itself must be restricted, use Password Protect PDF.
Lower the opacity. Something in the region of ten to twenty per cent usually stays clearly visible while leaving the document readable.
The watermark is applied across the document. To mark a single page, use Add Stamp, which places a mark on the pages you choose.
The image has no transparency - a JPEG cannot carry any. Use a PNG with a transparent background instead.
Files are uploaded over an encrypted connection and processed on CoonTool's own server, not in your browser. The working copy is deleted automatically once the job is done, and in any case within 24 hours. Nothing is stored permanently and no account is required.