Stampix – Fast, private batch watermarking directly in your browser

Summary: Stampix is a browser-based tool that adds watermarks to hundreds of images instantly without uploading files. It processes images locally using Canvas API and WebAssembly, ensuring privacy and no batch size limits while also allowing resizing and format conversion.

What it does

Stampix applies watermarks, resizes, and converts images to WebP format in a single batch operation entirely on the user’s device, avoiding any cloud uploads.

Who it's for

It is designed for users needing to watermark large numbers of images quickly and privately, such as freelancers or online sellers.

Why it matters

It eliminates slow uploads, privacy risks, and batch size restrictions common in other free online watermarking tools.