Remove the Gemini Watermark, Pixel-Perfect
Reverses the alpha-compositing Gemini applies to free-tier images. No AI inpainting, no guessing — just the exact inverse of the blend equation, computed in your browser.
01 / Guide
How it works
Gemini stamps the visible star logo by alpha-compositing a fixed, known white logo onto your image:
watermarked = α × logo + (1 − α) × originalBecause α and the logo are constants (only two variants, one for images up to 1024 px and one for larger), the blend is exactly invertible:
original = (watermarked − α × logo) / (1 − α)This tool reads the watermark rectangle from your image, applies the inverse formula per pixel, and writes the clean pixels back. Precision is ±1 per RGB channel — invisible to the eye. Before running, it samples the rect and verifies the pixels look like a Gemini stamp; if they don't, it stops rather than mangle the corner.
The rest of your image is not touched.
02 / Guide
Privacy
Everything runs locally in your browser. Your image is never uploaded to any server — not LogoNuri's, not anyone's. You can disconnect from the internet after the page loads and the tool will still work.
03 / Guide
Credits
The alpha maps and core algorithm are adapted (MIT license) from the open-source gemini-watermark-remover project, which in turn credits journey-ad/gemini-watermark-remover.
04 / Keep going