Add Watermark to PDF

Overlay diagonal semi-transparent watermarks to protect your intellectual property.

About this tool

Protect confidential documents, contracts, and proofs with clear, elegant watermarks.

How to use this tool

  1. Upload PDF
  2. Enter watermark text and set opacity
  3. Click Execute and download

How it works

Calculates center coordinates and renders rotated semi-transparent vector typography.

When to use this tool

  • Marking documents as DRAFT, CONFIDENTIAL, or SAMPLE

Frequently asked questions

Can the watermark be easily erased?

The watermark is baked into the PDF content stream.

Limitations

Uses client font rasterization/vector embedding.

Privacy

Private documents remain exclusively on your computer.