Remove Nano Banana Watermarks from AI Images
Google Gemini and other AI image generators embed a small "Nano Banana" watermark in their output. This tool removes it in bulk using reverse alpha blending — entirely in your browser. Your images never leave your device.
Remove Nano Banana Watermarks
100% private. Images never leave your device. All processing runs locally in your browser.
Output format
Metadata
Drop files or a folder here
Non-image files are automatically ignored. Supported: PNG, JPG, WebP.
Privacy-first processing
What is the Nano Banana watermark?
The "Nano Banana" is a semi-transparent watermark that certain AI image generators — most notably Google Gemini — embed in their output images. It serves as a visible indicator that the image was generated by AI rather than photographed or hand-drawn. The watermark is typically a small, faintly visible banana-shaped icon placed in a corner of the image.
While the intent behind the watermark is provenance tracking, it can be problematic when you want to use AI-generated images in professional contexts — marketing materials, presentations, mockups, or social media content where a visible watermark looks unprofessional.
How the Banana Remover works
1. Upload your images
Drop individual files, select multiple images at once, or choose an entire folder. The tool accepts PNG, JPG, and WebP — the formats AI generators typically output.
2. Reverse alpha blending
The tool identifies the watermark overlay pattern and mathematically reverses the alpha blending operation that was used to composite it onto your image. This recovers the original pixel values underneath the watermark.
3. Download clean images
Download each cleaned image individually or grab them all as a ZIP. Choose between PNG (lossless), JPG (smaller file size), or WebP (best of both) for the output.
Who uses the Banana Remover?
Content creators and marketers
If you use AI-generated images for blog posts, social media, or ad creatives, a visible watermark undermines the professional appearance of your content. Remove it before publishing.
Designers and mockup artists
AI-generated images are useful for rapid prototyping and concept exploration. Cleaning up watermarks lets you present polished mockups to clients without the distraction of an AI provenance badge.
Developers building with AI APIs
If your product generates images via the Gemini API and you need clean output for your users, bulk-processing through this tool gives you watermark-free results without writing custom image processing code.
Anyone who values privacy
Most watermark removal tools require you to upload images to a server. This one doesn't. If the images you're cleaning contain sensitive or proprietary content, client-side processing means they never leave your machine.
Frequently asked questions
What is the Nano Banana watermark?
It's a semi-transparent banana-shaped icon that Google Gemini and some other AI image generators embed in their output to indicate the image is AI-generated. It's typically placed in a corner of the image and is designed to be subtle but detectable.
Does this tool upload my images to a server?
No. Everything runs in your browser. The tool reads your image files locally, applies the reverse alpha blending algorithm in JavaScript, and outputs the cleaned images — all without any network request.
Can I remove watermarks from many images at once?
Yes. You can select multiple files or an entire folder. The tool processes each image sequentially and lets you download all results as a ZIP archive.
Will this damage my image quality?
The reverse alpha blending process recovers the original pixel values under the watermark. Saving as PNG preserves full quality. If you save as JPG or WebP, the usual lossy compression applies — but no differently than any other export.
Does this work on watermarks from tools other than Gemini?
The tool is specifically tuned for the Nano Banana watermark pattern. It may not work on arbitrary watermarks from other sources. For general watermark removal, you'd typically need an inpainting approach.
Is it legal to remove AI watermarks?
This depends on your jurisdiction and how you intend to use the images. This tool is provided for legitimate use cases where you have the right to use the underlying image. Please check applicable terms of service and local regulations.