Watermark PDF
Add secure text stamps or logos to your PDF documents in seconds. All watermarking runs 100% inside your browser, ensuring complete privacy and immediate downloads.
Click to choose a file or drag and drop
Supported types: application/pdf, .pdf (Max: 50 MB)
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100% free, unlimited, and private in-browser processing
Custom text & image stamps
Add custom stamps such as 'CONFIDENTIAL', 'DRAFT', or company logo images across all pages or specific page ranges with customizable transparency.
Precision angle and placement
Choose from 9 distinct anchor positions, adjust rotation angles (45°, 90°, custom), and tune opacity levels to protect your intellectual property without obscuring text.
How to watermark PDF documents online
- Upload your PDF document into the tool.
- Select whether to apply a Text or Image watermark.
- Enter your custom text or select an image file, then configure angle, font size, and opacity.
- Click 'Add Watermark to PDF' and download your secured document.
Frequently Asked Questions
Are my confidential files uploaded to any server?
No. All watermarking is performed 100% locally in your web browser with zero server uploads.
Can I adjust watermark transparency?
Yes. You can customize the opacity from 10% (subtle background watermark) up to 100% (solid stamp).