How to Add CONFIDENTIAL Watermark to Sensitive Documents

Add Watermark

The Problem

You need to share sensitive documents externally — client data, financial reports, legal agreements, or proprietary research — but want to clearly mark them as confidential to deter unauthorized copying, forwarding, or distribution. Without a visible mark, there's nothing stopping someone from stripping the cover page and sharing your content.

The Solution

SprinkleTools' Watermark tool stamps a customizable CONFIDENTIAL label across every page of your PDF. The semi-transparent watermark is visible enough to clearly establish the document's restricted status, while remaining unobtrusive enough for comfortable reading.

How to Do It

Open the Add Watermark tool on SprinkleTools

Upload the sensitive PDF document

Type 'CONFIDENTIAL' or choose your preferred text

Adjust transparency to 15-20% for a professional look

Choose diagonal placement for full-page coverage

Preview to ensure it looks right

Download your watermarked PDF and share securely

Ready to get started?

Try Add Watermark free — no software to install.

Use Add Watermark

Frequently Asked Questions

Can I use custom text instead of CONFIDENTIAL?

Yes — type any text you want. Common options include DRAFT, SAMPLE, DO NOT COPY, DO NOT DISTRIBUTE, INTERNAL ONLY, or your company name.

Is the watermark removable?

The watermark is permanently embedded in the PDF. It can't be easily removed without specialized tools. For added security, also use password protection.

Will the watermark appear on every page?

Yes — the watermark is applied consistently to all pages automatically.

Can I adjust the appearance?

Yes — control the transparency (opacity), size, rotation angle, and position of the watermark to match your needs.

Related Use Cases

How to Add a DRAFT Watermark Before Internal Review

You're circulating a document draft with colleagues or clients for review, and you need to clearly mark it as a preliminary version. Without a visible DRAFT label, reviewers might mistake it for a final document — leading to premature approvals, citations of unfinished content, or confusion about which version is authoritative.

How to Brand PDFs with Your Company Name Watermark

You share whitepapers, proposals, case studies, and reports externally — but they don't carry your branding. Without a visible mark, anyone could strip the cover page and claim the content as their own. You need a way to subtly brand every page without ruining readability.