How to watermark an image
1. Drop one photo or a batch. 2. Edit the text (it starts as DRAFT) or choose a PNG, JPG or WebP logo. 3. Pick placement, strength and, for text, a color that you can still read on the photo. 4. Press “Add watermark” and download.
The picture keeps its pixel size. Transparent logos stay transparent on PNG and WebP. JPG has no transparency, so empty areas of a logo sit on the photo color underneath, and a transparent photo becomes white.
Text, logo, or both
Text is drawn in a bold face with a thin outline so it stays readable on busy photos. A logo is scaled to a slice of the width and placed on the same spots. Repeated mode tiles both. Use a corner when you only want a small credit.
What is removed
The new file is drawn on a canvas, so camera location and other EXIF data are not copied. Orientation is already applied to the pixels. This does not lock the image: someone can still crop the stamp off.