Add a watermark to a PDF: text or image, on every page or some

Overview

Type the text, CONFIDENTIAL is suggested, and pick one of 6 colours, or choose a picture such as a logo instead. Then set the size, the opacity from 5% to 100%, and the angle anywhere from −90° to 90°. Place it with a 3×3 grid, from top left to bottom right, or turn on Repeat across the page to tile it. A live preview shows the page as it will be saved, and you can apply the watermark to all pages or only to the ones you select.

The watermark is written as vector content rather than flattened into a picture, so it stays crisp at any zoom and the text underneath remains selectable and searchable, whatever script the document uses. Everything else on the page is copied as it is: text, links, form fields and drawings. The result is saved as a new PDF in My files; the original is not changed. Password-protected or restricted PDFs are refused with an explanation. The same settings are shared with Batch watermark, which stamps photos.

Mark a draft as DRAFT before it goes to a client, stamp a proposal CONFIDENTIAL, put your logo on every page of a portfolio, or add your name to documents you hand over so copies can be traced back. Because the tool runs on your device, the document is never uploaded, and watermarking works without an internet connection, whether the file has one page or several hundred.