Free PDF Watermark Online
Add text watermarks to your PDF files with full customization. Set text, size, color, opacity, and position.
Supports PDF · up to 100 MB
Processing PDF...
✓ Watermark applied successfully!
How It Works
- Upload a PDF file using the drop zone above.
- Customize the watermark text, size, color, and opacity.
- Choose the position (center diagonal, top, or bottom) and which pages to apply it to.
- Click "Apply Watermark" to process your PDF.
- Download the watermarked PDF instantly.
Why Add Watermarks?
Watermarks protect your intellectual property by marking documents as confidential, copyrighted, or under review. They discourage unauthorized sharing and printing while maintaining document readability. Common use cases include marking drafts, protecting trade secrets, copyright notices, and branding documents.
Watermark Options
- Text · Enter any text for your watermark (e.g., "CONFIDENTIAL", "DRAFT", company name).
- Font Size · Choose from 20pt to 100pt to match your document.
- Color · Pick any color; light gray is recommended for readability.
- Opacity · Adjust transparency (10-100%) to balance visibility and readability.
- Position · Center (45° diagonal), Top, or Bottom of pages.
- Pages · Apply to all pages, first page only, or a custom range.
Frequently Asked Questions
Is my PDF secure?
Yes. All processing happens in your browser. Your PDF never leaves your device and is not uploaded to any server.
Can I remove a watermark?
Watermarks added by this tool can be removed by re-processing the original PDF without a watermark. For encrypted or protected PDFs, removal may require additional tools.
What file size limit is there?
PDFs up to 100 MB can be processed. Processing time depends on file size and your device capabilities.
Can I use images or logos instead of text?
This tool adds text watermarks. For image/logo watermarks, use a desktop PDF editor like Adobe Acrobat or free alternatives.