Add Watermark
Add text watermark to your PDF document.
Drop a PDF file here or click to select
Max file size: 10.00 MB
How to Add a Watermark to a PDF Online
- Upload the PDF you want to watermark
- Enter your watermark text (e.g. CONFIDENTIAL, DRAFT, DO NOT COPY)
- Customize position, opacity, and font size
- Click "Add Watermark" and download the result
Why Add a Watermark to a PDF?
Watermarks clearly indicate a document's status - CONFIDENTIAL, DRAFT, SAMPLE, COPY - and discourage unauthorized distribution. They're essential for legal documents, internal reviews, and pre-release materials.
- Mark documents as CONFIDENTIAL, DRAFT, or SAMPLE
- Discourage unauthorized copying or sharing
- Fully customizable text, position, opacity, and size
- Applied to every page automatically
- No Adobe Acrobat required
Features & Benefits
- Custom Text: Enter any text - CONFIDENTIAL, DRAFT, your company name, or anything else.
- Adjustable Opacity: Set opacity from subtle (10%) to bold (100%).
- Position Control: Place the watermark at center, top, bottom, or any custom position.
- All Pages: Watermark is applied to every page automatically.
- Free: Add watermarks at no cost, no registration.
- Preview: Preview the watermarked PDF before downloading.
Frequently Asked Questions
How do I add a CONFIDENTIAL watermark to a PDF?
Upload your PDF, type "CONFIDENTIAL" in the text field, adjust position and opacity, click Add Watermark. Free and instant.
Can I add a watermark without Acrobat?
Yes. Pdiffy adds text watermarks to any PDF directly in your browser. No software needed.
Can I control the opacity?
Yes. Use the opacity slider from 10% (barely visible) to 100% (fully opaque).
Will the watermark appear on every page?
Yes, it's applied to all pages automatically.
Is there a free PDF watermark tool?
Yes - Pdiffy's watermark tool is completely free with no sign-up.