Remove Gemini and Nano Banana watermarks from your images instantly. 100% free, no uploads to servers — everything runs in your browser.
No sign-up required. Your images never leave your device.
Drag & drop images here, or click to select
PNG, JPEG, WebP — up to 20 images at once
Drag and drop any Gemini-generated image into the tool above, or click to browse files.
The tool detects the Nano Banana watermark and applies reverse alpha blending in under 100ms.
Preview the before/after and download your watermark-free image. No quality loss.
original = (watermarked - α × logo) / (1 - α)
Install the Banana Clean Chrome extension. It intercepts downloads from Gemini and AI Studio and removes the watermark automatically — no extra steps.
The tool uses reverse alpha blending to mathematically undo the watermark. The formula is: original = (watermarked - α × logo) / (1 - α). Pre-computed masks at 48x48 and 96x96 pixels match the Nano Banana logo exactly. All processing runs in your browser using the Canvas API — no images are uploaded anywhere.
Yes, this online tool is completely free with no limits. For automatic watermark removal on every download from Gemini and AI Studio, install the Banana Clean Chrome extension — 15 free cleans included, then PRO from $2.99/month.
No. All processing happens locally in your browser using the Canvas API. Your images never leave your device. There are no server calls, no cookies, no tracking of image content.
The tool accepts PNG, JPEG, and WebP images — all formats used by Gemini and Google AI Studio for downloads. The cleaned image is saved as PNG for lossless quality.
Yes. Drag and drop or select multiple images. Each is processed independently and you can download them all individually.
This online tool requires you to manually upload and download each image. The Banana Clean extension removes the watermark automatically every time you click Download in Gemini or AI Studio — no extra steps. Read the full comparison.
No. Google embeds two watermarks: the visible Nano Banana logo in the corner (this tool removes it) and SynthID — an invisible watermark in pixel data by Google DeepMind. SynthID cannot be removed without destroying image quality. Learn about SynthID.
Yes. Both Nano Banana and Nano Banana Pro use the same visible watermark. The tool includes masks for both 48x48 and 96x96 pixel variants.
Install the extension. Automatic removal on every download.