Add Watermark to Image
Stamp custom text watermarks or transparent PNG logos with custom opacity, rotation, and positioning 100% privately in your browser.
Drop photo here to watermark
or click to browse from your computer
Supports JPG, JPEG, PNG, WEBP, and BMP up to 50MB per file.
How to Watermark Photos Online
Upload Base Photo
Select or drag and drop any JPG, PNG, or WebP photo into the workspace.
Add Text or Logo
Type custom copyright text or upload a transparent PNG logo. Customize opacity and alignment.
Download Image
Click "Download Watermarked Image" to save your protected photo instantly.
Why Add Watermarks to Your Images?
🛡️ Protect Copyright
Prevent unauthorized content scraping and re-use of your original photography on social media.
📣 Increase Brand Awareness
Stamp company logos or website URLs so viewers always know the original source of your work.
🔒 100% Local Browser Privacy
No server uploads means complete security for private client drafts, property photos, and artwork.
Technical Specifications
| Feature | Specification |
|---|---|
| Supported Base Formats | JPG, JPEG, PNG, WEBP, BMP |
| Watermark Modes | Custom Text (Fonts, Colors) & Logo Overlay (PNG, SVG) |
| Position & Pattern Modes | 9-Point Grid Alignment & Full-Surface Tile Pattern Grid |
| Export Formats | PNG, JPG, WebP |
| Max File Size Safety Limit | 50 MB per file |
Frequently Asked Questions
Is my original photo quality preserved?
Yes! ConverterMaster renders watermarks directly onto your high-resolution image using HTML5 Canvas without forced downscaling.
Can I use a transparent PNG logo as a watermark?
Yes! Transparent PNG and SVG logos are fully supported with opacity slider controls.
Are my images uploaded to any server?
No! All image compositing happens 100% inside your local web browser. Your photos are never uploaded.