How to add a CONFIDENTIAL watermark to a PDF
Flagging a PDF as CONFIDENTIAL warns readers before they share it. Drop the PDF into PDF Verified, add a CONFIDENTIAL watermark, set the colour and opacity, and apply it to every page. Download the watermarked PDF with the mark sealed in — not a removable overlay.
Add a CONFIDENTIAL watermark →
How to add a CONFIDENTIAL watermark to a PDF — step by step
- Upload your PDF — Open Quick Sign and drop in the PDF.
- Add the CONFIDENTIAL watermark — Add a Watermark field, type CONFIDENTIAL, set the colour, size and opacity, and apply it to all pages.
- Download the watermarked PDF — Download the finished PDF with the watermark baked into every page.
What you get
- Diagonal CONFIDENTIAL watermark across every page.
- Adjustable colour, size and opacity.
- Baked in — not a removable overlay.
- Also works for DRAFT, COPY or custom text.
- Processed in your browser — nothing uploaded.
Frequently asked questions
How do I mark a PDF CONFIDENTIAL?
Add a Watermark field, type CONFIDENTIAL, set the opacity, apply it to all pages, and download.
Can the watermark be removed?
No. It is sealed into the PDF page, so recipients cannot simply toggle it off.
Can I change the colour?
Yes. Pick the watermark colour and adjust the opacity to suit the document.
Does it cover every page?
Tick “apply to all pages” to cover the whole document in one step.