Watermark PDF
Add custom stamps or watermark text across all PDF pages to protect drafts and confidential proposals.
Drop your PDF documents here
Or click to browse on your device. Apply text watermarks or page numbering in real time.
Add diagonal text watermarks to PDF documents online
Stamping a diagonal watermark such as "CONFIDENTIAL", "DRAFT", "COPY", or your company name is a standard security practice before sharing documents with prospective clients, vendors, or external review committees.
With this tool, you can apply custom watermarks across all pages of your PDF simultaneously. Customize the watermark text, font, angle, color, and opacity so the stamp remains clearly visible without obstructing readability.
When you will need to watermark a PDF
Project drafts and proposals
Stamp unapproved proposals with "DRAFT" to prevent them from being mistaken for final contracts.
Confidentiality protection in negotiations
Stamp "CONFIDENTIAL" on financial audits or business plans to highlight sensitive corporate information.
Archive and informational copies
Label duplicates with "COPY ONLY" for internal office tracking and bookkeeping records.
Frequently asked questions about watermarking PDFs
Yes. The tool stamps the watermark across all pages automatically in identical placement and orientation.
Yes. You can fine-tune opacity so the watermark serves as a subtle background stamp while keeping all page content legible.
The watermark is embedded directly into the page content stream, preventing one-click removal in standard viewers.