Image Watermark
Local
Drop images here, or click to browseSupports JPG / PNG / WebP / AVIF, batch supported
FAQ
Does batch watermarking change image dimensions?
No. Output keeps the original size; images with an edge longer than 8000 pixels are scaled down proportionally before encoding to keep browser memory in check.
Which watermark styles can I adjust?
Text, font size, colour and opacity are all adjustable. Placement supports nine grid positions or a full-image tile, with a margin to keep the watermark off the edges.
Are my images uploaded?
No. Watermark drawing and encoding run entirely in your browser; your research data never touches a server.