add watermark to pdf online free

A text watermark is a simple, effective way to mark a document's status or ownership at a glance. Common examples include 'CONFIDENTIAL' for sensitive material, 'DRAFT' for work in progress, or a company name for branding. The watermark appears on every page, making the document's status immediately clear to anyone who opens it.

Getting the watermark to look right involves a few settings working together: opacity controls how subtle or bold it appears, so a light 20-30% opacity lets the underlying text stay fully readable while still being visible, while a bolder 60%+ opacity makes the watermark itself more prominent. Position determines where on the page it sits, commonly centered or in a corner depending on how much attention you want it to draw.

A diagonal angle, typically around 30-45 degrees, is the classic look for watermarks like 'CONFIDENTIAL' or 'DRAFT', since it reads clearly without competing directly with the horizontal body text on the page. A straight horizontal watermark works better for a subtler footer-style brand mark or copyright notice.

Once you're happy with the preview, download the watermarked PDF. Since the watermark is applied directly to the file, it appears the same way for anyone who opens it, whether they view it on screen or print it, which is exactly the point: a consistent, visible mark on every copy of the document.