How it works

Gemini AI adds a small visible watermark (the Gemini sparkle logo) to generated images using alpha compositing: each pixel is blended as watermarked = alpha × 255 + (1 − alpha) × original. This tool reverses that formula to recover the original pixels.

• 100% client-side — your images never leave your browser.
• Reverse alpha blending — mathematically recovers original pixel values.
• Adaptive detection — finds the watermark even at non-standard positions.
• Only removes the visible logo — does not affect invisible SynthID watermarks.

Credits

Watermark removal algorithm ported from GargantuaX/gemini-watermark-remover (MIT License), itself based on allenk/GeminiWatermarkTool.