No detour out of Gemini
Prompt, preview, copy, and download inside Gemini. Cleaned versions take over the page's own buttons, so you never drag an image into a second tool.
Tampermonkey userscript
Gemini Watermark Remover Userscript
For people who already run Tampermonkey or Violentmonkey. The script swaps Gemini's preview, copy, and download output for a locally cleaned version — no detour out of Gemini.
userscript
Ready for Gemini
// @name
Gemini NanoBanana Watermark Remover
// @match
https://gemini.google.com/*
Gemini NanoBanana Watermark Remover
// @match
https://gemini.google.com/*
Install in three steps
Open the .user.js installer, review the script details, and return to Gemini. The workflow stays inside your browser.
- 1
Add a script manager
Use Tampermonkey or Violentmonkey in Chrome, Edge, Firefox, or another browser that supports userscripts.
- 2
Install this .user.js file
Click the install button on this page. Your manager should show the script name, Gemini match rules, and Google image resource access.
- 3
Go back to Gemini
Generate or reopen an image in Gemini. When the result is supported, preview, copy, and download actions use the cleaned local version.
Use it when the page is your workspace
Images stay in your browser
Cleanup uses local browser processing. This site does not receive your Gemini images for the userscript workflow.
Clear limits
It targets visible Gemini logo watermarks on supported results, not SynthID, metadata, or unrelated image watermarks.
Userscript FAQ
Which userscript manager should I pick: Tampermonkey or Violentmonkey?
Both work. Pick Tampermonkey if you already have it, or Violentmonkey if you want an open-source manager. The script registers the same Gemini host rules under either.
What is the Gemini Watermark Remover userscript?
It is a Tampermonkey-compatible userscript for the Gemini web app. It tries to replace supported generated image previews, copies, and downloads with locally cleaned versions.
Does the userscript upload images?
No images are uploaded to this site. The script may fetch the image resource already used by Gemini from Google image domains so your browser can process it locally.
Which browsers and script managers work?
Use Tampermonkey or Violentmonkey in Chrome, Edge, Firefox, or another compatible browser. Browser and manager updates can affect userscripts, so keep both current.
How is it different from the Chrome extension or online tool?
The userscript is best if you already use a script manager. The Chrome extension is a packaged Chromium install, while the online tool is better for files you have already downloaded.
Why does the userscript request Google image access?
Gemini often serves generated images from Google image resource domains. The script needs that access to read the image in the browser and produce the cleaned copy.
Does it remove SynthID or invisible watermarks?
No. It targets the visible Gemini logo watermark only. It does not remove invisible SynthID signals, metadata, or provenance markers.
What should I do if the watermark is still visible?
Refresh the Gemini tab, confirm the userscript is enabled, and try the image again. For unsupported cases, use the online tool or report the browser name and screenshot on GitHub.
Already running a script manager?
Stay in Gemini — the userscript handles preview, copy, and download in the page. The Chrome extension is the packaged path; the online remover is for files already on your device.