Tool
Image Watermark Online Free
Add a text watermark to your image with custom styling. No sign up required.
Drop image here or click to upload
Your file stays in your browser — nothing is uploaded
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How to Add Watermark to Image
Upload image
Select or drag the image you want to protect.
Enter watermark text
Set text, size, color, opacity, and position.
Download
Save your watermarked image.
Add Text Watermark to Images Online — Free Image Watermark Tool
Protect your photos and images with a custom text watermark. Our free online watermark tool lets you add text overlays to any image with full control over font size, color, opacity, and position. Whether you need to brand your photos, protect copyrighted images, or add labels to documents, this tool handles it all instantly in your browser.
Choose from multiple placement options including center, corners, or a diagonal tile pattern that covers the entire image for maximum protection. The adjustable opacity slider lets you find the perfect balance between visibility and not obstructing the underlying image content. Use the tile option for stock photo-style watermarks that are difficult to remove.
All processing happens locally in your browser using the Canvas API — no file uploads, no server processing. Your images never leave your device, making this the safest way to add watermarks to sensitive photos. Works on Chrome, Firefox, Safari, and Edge with no software installation required.
FAQ
Image Watermark | PDFOnlineToolbox
Image Watermark | PDFOnlineToolbox
How do I add a watermark to my image?
Can I tile the watermark across the entire image?
What image formats are supported?
Is my image uploaded to a server?
Alpha Blending and Layer Compositing
Image watermarking blends custom text or transparent PNG overlays onto underlying image buffers using alpha channel compositing. Position, rotate, and scale watermarks locally with complete precision to protect visual IP.
Key Use Cases
- Protecting photographer portfolios and digital artwork from unauthorized web use
- Branding e-commerce product imagery with store logos and promotional tags
- Stamping copyright notices across promotional graphics before social distribution
Privacy & Security Guarantee
Because this utility executes entirely within your web browser's local sandbox, your sensitive files are never uploaded to cloud servers, stored in temporary directories, or inspected by third-party logs. This ensures complete data confidentiality and compliance with privacy standards.
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