ShadowToolkit

Add Watermark to Image

Add text watermarks and copyright stamps to photos.

100% In-Browser
All-In-One StudioBulk + Single

Want to process images in bulk, add compressions, conversions, filters & background removal all in one flow?

Try Image Playground
100% In-Browser PrivacyLocal

Your files and data are processed locally and never leave your device.

Upload image to edit

Crop, rotate, adjust filters, add watermarks, and analyze colors locally

Max size: 150MB •100% In-Browser

What is Add Watermark to Image?

Add Watermark protects your visual intellectual property by applying customizable text or logo watermarks over your images. Position your branding in any corner, center, or tiled repeating grid, with complete control over opacity, rotation, font styling, and color.

Zero-Server Client-Side Guarantee

Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.

Key Capabilities

  • Supports both custom text watermarks and graphic logo overlays
  • Configurable opacity, font size, color, rotation angle, and shadow styling
  • Preset 9-point alignment grid (top-left, center, bottom-right, etc.) plus tiled pattern mode
  • High-resolution export preserving original photo quality
  • 100% client-side rendering—your original photos are never uploaded

Common Use Cases

1Protecting professional photography proofs before client review and delivery
2Adding company branding and copyright notices to marketing graphics and infographics
3Watermarking real estate and e-commerce listings to prevent competitor image scraping
4Optimizing raster graphics and illustrations for high-performance responsive web design and mobile apps

How to use Add Watermark to Image

01

Upload Image

Select the photo you want to watermark.

02

Choose Watermark Type

Enter custom text or upload a transparent PNG logo.

03

Adjust Position & Opacity

Set alignment, adjust transparency slider, and fine-tune size.

04

Download Watermarked Image

Save your protected photo.

Frequently Asked Questions

An opacity between 30% and 50% ensures the watermark is clearly visible to deter theft without obstructing photo appreciation.

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