Everything you need to know about adding watermarks to PDF documents online with PDF Lab's free tool
Go to Add Watermark ToolThe Watermark PDF tool adds an image, such as your logo or a "CONFIDENTIAL", "DRAFT" or "APPROVED" stamp, to every page of your PDFs. You control its position, transparency, size and angle.
An image watermark in PNG, JPG or JPEG format. A PNG with a transparent background blends best with the page. To use words as a watermark, save them as an image first, for example a stamp graphic.
Choose from nine positions: the four corners, the middle of each edge, and the centre of the page. The same position is used on every page.
Yes. Choose several PDF files and the same watermark is added to each. Download the files one by one or all together as a ZIP. For larger batches, Batch Watermark PDF is designed for many files.
Yes. "Process locally (no upload)" is switched on by default. Your PDFs and image stay in your browser. Local mode works best when the files add up to less than about 100 MB. For bigger jobs, switch it off to process on our server; the files are deleted after processing.
A watermark shows who owns a document or what its status is, and discourages misuse. It does not stop copying or printing. To restrict those, add a password and permissions with Protect PDF after watermarking.
Not directly. Remove the password first with Unlock PDF (you need to know the password), then add the watermark.
Yes. It works in modern browsers on Android phones, iPhones and tablets. You can pick PDFs and a watermark image from your files or photos.
In local mode, which is the default, nothing is uploaded. In server mode, your files are used only to create the watermarked PDFs and are then deleted. We never sell or share your documents.