CleanMark

The tool provides a browser‑based service that detects and removes the subtle watermark added by Google Gemini and the Nano Banana logo from AI‑generated images. Users can drag and drop JPG, PNG, or WebP files, and the application applies a pixel‑accurate cleaning algorithm that aims to preserve the original visual quality without introducing artifacts. An optional resizing feature lets users specify one or both dimensions for the output image, and the processing runs locally via WebAssembly, ensuring that image data never leaves the user’s device.

Target audiences include content creators, designers, researchers, and educators who need watermark‑free images for social media, client work, academic papers, or teaching materials. The service is positioned as a free, instant solution with no registration, limits, or hidden fees, and it is available both as a web page and as a Chrome extension.

The distinctive aspects are its privacy‑first approach—processing occurs entirely in the browser—and its claim of pixel‑perfect removal with no quality loss, supported by a detection engine that automatically identifies the specific watermark patterns.