For Gemini & Nano Banana images
Nano Banana images carry the standard Gemini corner mark — the same one this Nano Banana watermark remover reverses, on your own device.
Free, unlimited, and nothing is uploaded.
Works best on the original file from Gemini. Screenshots, crops and re-saved copies may keep a faint trace — or not be recognised at all.
Good to know
Nano Banana is the nickname that stuck to Google’s Gemini image generation model. Images made with it are Gemini images, and they carry exactly the watermark Gemini applies to everything else it generates.
That is why one engine covers both: a Nano Banana watermark remover and a Gemini one are the same tool. There is no separate Nano Banana watermark to detect — it is the same mark, drawn by the same pipeline, at the same place.
Nano Banana started as an unofficial name for Google’s image generation model and ended up on the product itself. It is the image side of Gemini rather than a separate service, which is why an image you made with Nano Banana arrives as a Gemini file, with Gemini’s marking on it.
If you have been searching for a Nano Banana watermark remover and finding Gemini ones instead, that is the reason — for the purposes of the watermark, they are the same thing.
Before building this Nano Banana watermark remover, we measured the mark across a set of real Gemini outputs rather than assuming anything, and it is consistent in a way that makes reversal possible.
There are two, and they are completely different things. Confusing them is the single most common misunderstanding about this topic.
The visible one is the corner mark — an overlay painted on top of the finished picture. That is what this Nano Banana watermark remover reverses.
The invisible one is SynthID, a statistical signal woven into the image data during generation rather than stamped on afterwards. It is not an overlay, there is nothing to peel off, and this tool makes no attempt to detect, alter, or remove it. Any tool claiming to strip SynthID is worth treating with suspicion.
Since August 2026, Google has offered a setting that turns the visible watermark off before you generate. If it is available on your account, switching it off is less work than cleaning images afterwards.
In some regions — India, South Korea and Vietnam among them — the setting requires a higher subscription tier. And it does nothing for images you have already made, which is what this Nano Banana watermark remover is for.
PNG, JPEG and WebP go in; PNG comes out, from 80×80 up to 8000×8000 pixels and 30 MB per file. Everything runs in your browser, so there is no queue and no quota.
Use the file you downloaded from Gemini rather than a screenshot of it. The reversal depends on the watermark pixels being exactly as they were written, and screenshotting or re-saving changes them.
Common questions
Something not covered here? Write to hello@watermarkeraser.net.
No. Nano Banana is Google’s image generation model within Gemini, and its output carries the standard Gemini corner mark. Any Gemini watermark remover that works also works as a Nano Banana watermark remover, because there is only one mark.
It works on any Gemini image whose corner mark matches the pattern the engine knows, which covers the current output sizes. If Google changes the mark, the tool will say it found nothing rather than guess — and reporting nothing is the correct behaviour, since a confident guess in the wrong place would damage a clean image.
Most often because the file is not the original. Screenshots, resized copies, and images re-saved by another app move or alter the mark enough that the pattern no longer matches. It can also mean the image was generated with the visible watermark already switched off, in which case there is genuinely nothing to remove.
No, and we would not claim otherwise. SynthID remains in the image data after processing, and detection tools that look for it will still find it. This tool removes a visual overlay, nothing more.
No. There is no extension, no desktop app, and no permission prompt. The Nano Banana watermark remover runs in the page itself, which is also why there is nothing to uninstall afterwards.
It cannot. There is no server on our side that receives images, so there is nothing to store. You can verify this by loading the page, disconnecting from the internet, and processing an image — it still works.