How to Use Gemini Watermark Remover
Two ways to remove Gemini watermarks — a Chrome extension that works automatically on download, or a free online tool you can use right now without installing anything.
Chrome Extension — Automatic
Best for regular Gemini users. Install once, works automatically on every download.
Install CleanMark from the Chrome Web Store
Click "Add to Chrome" on the Chrome Web Store listing and confirm the prompt. Installs in seconds — no account or sign-in required.
Go to gemini.google.com and generate an image
Use Gemini as you normally would. The extension is already active — you don't need to configure anything.
Click the download button on any Gemini image
CleanMark intercepts the download automatically. It applies reverse alpha blending to remove the Nano Banana watermark in under 100ms.
Your clean image is saved
The watermark-free image lands in your Downloads folder — same filename, same resolution, zero quality loss. No extra steps.
What happens under the hood
When you click download, the extension intercepts the request and fetches the full-resolution image. It then applies reverse alpha blending — the mathematical inverse of how Google applies the watermark — to recover the original pixel values exactly. Everything runs in WebAssembly inside your browser. No data leaves your device.
Online Tool — No Installation
Works for any Gemini or Google AI Studio image. Upload and clean in seconds.
Save the image from Gemini or AI Studio
Download the image as usual from gemini.google.com or aistudio.google.com. It will have the Nano Banana watermark embedded.
Open the CleanMark online tool
Go to cleanmark.org/gemini-watermark-remover. No sign-in, no account — the tool is ready immediately.
Drop or browse to upload your image
Drag the image onto the upload area, or click "Browse files" to select it. Supports JPG, PNG, and WebP.
Download the clean result
Processing completes in under a second. Click Download to save the watermark-free image — same resolution, same quality.
Common Questions
Does the extension work automatically, or do I need to click something?
Fully automatic. Once installed, just download images from Gemini as you normally would. CleanMark intercepts every download silently — no extra clicks, no popups.
Does it work on Google AI Studio images?
Yes. You can remove watermarks from Google AI Studio images using the online tool — download the image from AI Studio, then upload it to cleanmark.org/gemini-watermark-remover. The Chrome extension's automatic interception currently supports gemini.google.com; AI Studio auto-removal is planned for a future release.
Is my image data safe?
All processing happens locally in your browser using WebAssembly. Your images are never uploaded to any server — not even ours. Zero bytes leave your device.
What browsers are supported?
The Chrome extension works on Google Chrome (v113+) and Chromium-based browsers (Edge, Brave, Arc). The online tool works in any modern browser.
What if the watermark isn't fully removed?
CleanMark uses the exact mathematical inverse of Google's watermarking process, so removal is complete and pixel-perfect for all standard Gemini images. If you encounter an issue, try the online tool as an alternative and report it on GitHub.