Image Watermark Adder

Sizing the text to the photo

The font size is measured in pixels of the image itself, from 12 to 120, so the same setting looks very different on different files: 36 pixels is bold on a 1080-pixel social image and nearly invisible on a 6000-pixel camera original. Resize large photos to their publishing size with the image resizer first, then add the watermark, so you judge it at the size people will see.

What a watermark actually protects

A small mark in a corner is easy to crop off or paint out with current editing tools; it credits the image more than it protects it. To discourage reuse, tile the text across the whole picture at a low opacity, around 20–40%, which stays visible but is hard to remove without damaging the photo. The result is saved as PNG, which is large for photographs, so convert it with PNG to JPG before posting.

How to use it

1. Select an image file.
2. Enter watermark text and customize position, size, and opacity.
3. Download the watermarked image.

Privacy & limitations

Processing is entirely client-side. No image data is saved or uploaded.