Upload a PDF and stamp a diagonal text watermark across every page — customize the text, size, and opacity.
A watermark stamped diagonally across a document is a simple, effective way to communicate a document's status or ownership at a glance — marking a draft as not-yet-final, labeling a document confidential before it's shared for review, or identifying a sample or preview version of a document before it's purchased or officially released. It's a visual cue that's hard to miss, precisely because it sits across the page rather than tucked into a corner.
This tool stamps your chosen text diagonally across the center of every page in a PDF, using a semi-transparent gray so the watermark is clearly visible without making the underlying content unreadable. You control both the text itself and its opacity, letting you balance visibility against how much it should recede into the background — a lighter opacity works well when the watermark is more of a subtle status indicator, while a stronger opacity makes sense when the goal is to actively discourage unauthorized distribution.
It's used by businesses marking draft contracts before final signature, photographers and designers marking preview or sample versions of work shared before payment, students and researchers labeling working drafts distinct from final submissions, and anyone who needs a document's status to be immediately obvious to anyone who opens it. Because watermarking happens locally in your browser, the original file is never uploaded to a server during the process.