Why watermark a PDF?
PDFs travel: quotes to clients, drafts to reviewers, contracts to counterparties, portfolios to prospects. A watermark tells every reader — at a glance and on every page — what the document's status is: DRAFT, CONFIDENTIAL, PREVIEW ONLY, DO NOT COPY, or simply your copyright line. It's the standard way to make leaked or forwarded copies self-identifying.
How to watermark a PDF
- Set your watermark text, size, color, opacity and rotation (diagonal red CONFIDENTIAL at ~35% opacity is the classic).
- Drop your PDF into the box above.
- The watermarked PDF is generated instantly in your browser and downloads automatically.
Private by design
Most online PDF watermarkers upload your document to a server, process it there, and hope you trust them. Contracts, unpublished financials or legal drafts shouldn't work that way. This tool uses a client-side PDF engine — the file is read, stamped and saved entirely inside your browser tab.
FAQ
Does it stamp every page?
Yes — the watermark is applied to every page of the document, sized relative to each page's own dimensions.
Is the text searchable or just an image?
It's real PDF text, which keeps file size small and quality perfect at any zoom.
Photos too?
Yes — use the watermark photo tool, add text to photo or bulk watermark for images.