Edit 4 min read17 July 2026
How to Add a Watermark to a PDF
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Use PDF Mate's Watermark PDF tool directly in your browser.
Why Add a Watermark to a PDF?
Watermarks serve as a visual indicator of a document's status or ownership. "CONFIDENTIAL", "DRAFT", "SAMPLE", or a company logo overlay — watermarks protect your content and communicate context at a glance.
Text vs Image Watermarks
Text watermarks are ideal for status labels like DRAFT or CONFIDENTIAL. You control the font size, colour, opacity, rotation, and position.
Image watermarks let you overlay a logo or stamp. Adjust opacity so it doesn't obscure the document content underneath.
Step-by-Step: Watermark a PDF
- Open the Watermark PDF tool.
- Upload your PDF.
- Choose text or image watermark.
- Set opacity, position, and size.
- Apply and download your watermarked PDF.
Best Practices
- Use 20–40% opacity for watermarks that are visible but don't overpower the content.
- Diagonal placement (45°) is the most common and hardest to crop out.
- For CONFIDENTIAL documents, apply to every page and use a high-contrast colour.