Drag & Drop Image

Supports JPG, PNG, WEBP, HEIC
Fast local processing

Powerful Features

  • Text & Image Logo Support

    Not just text. You can upload your own PNG/transparent logos to use as watermarks, perfect for brand identity.

  • Flexible Positioning

    Choose between Tile Mode (repeating pattern for security) or Single Mode (precise 9-point anchor positioning for minimal intrusion).

  • System Fonts & Customization

    Access your device's native system fonts (Sans/Serif/Mono) plus standard web-safe fonts. Customize color, rotation, opacity, and shadows.

  • HEIC & Auto Scaling

    Directly open iPhone HEIC photos without conversion. The smart Auto-Scale feature keeps watermarks proportional on any image size.

Frequently Asked Questions

Is my data private?

Yes, absolutely. This tool operates entirely within your browser using HTML5 Canvas technology. Your images are never uploaded to any server, ensuring 100% privacy for sensitive documents.

Does it reduce image quality?

We export images at high quality (0.95 JPEG quality or PNG). The resolution of your original image is preserved.

What is Auto Scale?

Auto Scale calculates the watermark size based on the image's diagonal length. This means a watermark set to "Size 50" will look relatively the same size on a small thumbnail and a 4K wallpaper.