Add Image Watermark

Add watermark.

Runs locally in your browser

Your inputs are processed locally in your browser and are not uploaded or stored by us.

Select Base Image

Select Watermark Image

Visual Watermark Only: This tool adds a visible watermark to the generated raster. It does not provide cryptographic protection, DRM, or strictly prevent copying.
Scale & Position: The watermark is proportionally scaled relative to the base image width, preventing aspect ratio distortion, and placed accurately using geometric bounding boxes.
Transparency Handling: A transparent PNG watermark correctly composites its alpha channel natively into the base image. If the base image is a JPEG, it will remain fully opaque.
Cumulative Resource Limits: Both the base image and the watermark image are loaded into memory simultaneously. A strict cumulative pixel limit is enforced to guarantee successful encoding.
Local Processing: Both original images remain unmodified on your device. Zero network uploads are performed.