2026 note: This post is from 2014. The WaterMark My Image plugin has since been removed from the WordPress repository or is no longer maintained. Modern alternatives are listed at the bottom of the post.
To stop people stealing your images, the 2014 plugin WaterMark My Image automatically stamped your site URL (or a custom watermark image) onto every image you uploaded.
2026 Replacement
- Easy Watermark: actively maintained, free, flexible.
- Image Watermark: free, good multi-image support.
- NextGEN Gallery: if you need a full gallery, watermarking is built in.
- Server-side: a tiny functions.php hook with ImageMagick / PHP-GD can stamp on upload — zero plugin dependency.
Practical Tips
- Put the watermark in a corner; 20–30% opacity reads naturally.
- A big logo wrecks the composition — a small URL stamp is enough.
- Always keep an unwatermarked archive of the originals.