Company logo
InputPDF + transparent PNG logo
Options
scale: Vừa (25%)position: giữaopacity: 20%
→OutputPDF with faded logo in center
🎯Document branding
Image Watermark
Add logo or image as watermark on all PDF pages
Drag & drop files here
or click to choose files
📎 Tải lên 1 file PDF + 1 hình ảnh watermark (PNG/JPG)
How to image watermark in 3 Steps
1
Upload the PDF file and watermark image (PNG/JPG)
2
Choose size, opacity, and position
3
Click add watermark and download the PDF
About the Image Watermark Tool
Add image watermarks to PDF online — place logos, stamps, or signature images on all PDF pages. Supports transparent PNG, JPG, with size, position, opacity, and layer customization.
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Transparent PNG Support
PNG logos with transparent backgrounds display beautifully on documents. Alpha channel fully preserved.
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Size & Position Control
Position options: center, top/bottom corners, left/right. Adjust size by page percentage.
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Opacity Adjustment
Opacity from 10% (very faint) to 100% (fully visible). Faint watermarks don't obstruct content.
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Applied to All Pages
Watermark automatically added to every page. Perfect for long multi-page documents.
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BetaPDF embeds watermark images directly into the PDF page stream with professional opacity processing. Supports transparent PNG (alpha channel) and automatic scaling by page ratio.
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Perfect for: adding company logos to quotes, stamping "APPROVED" on documents, adding signature images to contracts. For text-only watermarks, use text watermark instead. Then password-protect for security.
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Usage Examples
Security stamp
InputPDF + stamp PNG
Options
scale: Nhỏ (15%)layout: mosaicangle: 45°
→OutputPDF with stamp grid pattern
🎯Anti-copy document protection
Frequently Asked Questions
PNG, JPG, JPEG and WEBP. Transparent PNG is recommended for best results.
The watermark image is repeated in a grid pattern across the entire page, suitable for security watermarks.
Yes — upload a transparent PNG logo and choose "Center of page" or "Mosaic" position.
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