PDF Watermark Tool (Add Confidential, Draft & Custom Text Stamps)

Stamp custom text watermarks (CONFIDENTIAL, DRAFT, DO NOT COPY) across all PDF pages with adjustable diagonal angle, opacity, font size, color, and tiled grid modes.

🛡️ 100% Client-Side Privacy Guarantee: This utility executes inside your browser runtime. Zero data is transmitted to external servers.

How to Use PDF Watermark Tool (Add Confidential, Draft & Custom Text Stamps)

  1. Input your data or choose a sample preset in the interactive workspace.
  2. Click process or calculate to execute instant client-side evaluation.
  3. Copy or export the verified output result with one click.

Stamp Custom Text & Repeating Watermarks on PDF Documents

Protect contracts, invoices, and drafts by embedding custom vector text watermarks across every page of your PDF. Choose diagonal center stamps, repeating tiled grids, headers, or footers with full control over opacity, color, and typography size.

Frequently Asked Questions

Are the watermarks added as vector text inside the PDF?

Yes. Watermarks are drawn directly into each PDF page's content stream using embedded Helvetica Bold vector typography with customizable opacity and rotation.

Can I repeat the watermark in a tiled grid across every page?

Yes! Switch the Stamp Placement mode to 'Tiled Grid' to cover the entire page surface with repeating diagonal stamps.