Image Watermark

Features

• Positions: bottom right/left/centre, middle, top right/left, middle right, and tiled
• Tiling with a tilt angle (0°, 15°, 30°, 45°, −45°) that resists cropping
• Font size as a share of the short edge, consistent across resolutions
• Colour (white, black, off-white) and opacity from 25% to 100%
• Outline switch that keeps the watermark readable on any background
• Shows the output size and file size; PNG and WebP sources keep their format
• Nothing is uploaded — compositing happens in the browser

How to use

1. Drop an image in
2. Type the watermark text and pick position, size, colour and opacity
3. The result updates on every change
4. Click Download to save

FAQ

How do I stop people reusing my images?

Use the tiled position at a steep angle (45°). A corner watermark is gone as soon as that edge is cropped, whereas one covering the whole image is very laborious to retouch — and the content stays visible. The cost is text over the picture, which is why libraries only watermark previews and sell clean files.

Why is the size a percentage?

Because the same words need five times as many pixels to look the same on a 4000-pixel photo as on an 800-pixel one. A fixed 24px would be normal on the small one and a speck on the large one. As a share of the short edge, one setting looks right at every resolution with no re-tuning.

When should the outline be on?

When the photo is busy. White text vanishes on snow or a pale wall, dark text on a night shot or dark clothing. The outline draws a contrasting edge around the glyphs (dark for light text, light for dark text), so it stays readable whatever is behind. On flat backgrounds you can turn it off for a cleaner look.

Is the image uploaded?

No. The watermark is drawn with the browser's own canvas, entirely in local memory, and it works offline.