Image Watermark

The Image Watermark tool stamps a text caption or an uploaded logo image onto any photo, with full control over opacity, size and position — including a tiled mode that repeats the watermark across the entire image, which is much harder to crop out than a single corner stamp. It's built for photographers, designers and anyone sharing work online who wants their name or brand visibly attached before a preview image goes public.

A watermark's main job is deterring casual reuse: a client preview gallery, a portfolio site, or a stock-photo-style listing all benefit from a visible mark that discourages someone from lifting the full-resolution image and using it without permission or payment. Text watermarks work well for a quick copyright line or website URL; logo watermarks are the better choice once you have an actual brand mark, since a small logo reads as more professional than a text string and is instantly recognizable.

Position control covers the eight standard placements — each corner, each edge-center, and dead center — plus a tiled mode that repeats the watermark at a diagonal angle across the whole frame. Tiling trades a little visual cleanliness for real protection: a single corner watermark can be cropped out in seconds, but a full-image tile pattern can't be removed without visibly damaging the photo underneath it.

Rendering happens entirely on an HTML5 canvas in your browser — both the base image and, for logo mode, the watermark image you upload stay local, with nothing sent to a server. One practical note: opacity and color matter more than most people expect for legibility — a low-opacity light watermark can disappear entirely over a bright sky or white background, so it's worth checking the preview against the actual image rather than assuming a default setting will read clearly everywhere.