Free Gemini Watermark Remover — No Signup
Remove the Gemini star watermark from your images instantly. Free forever, 100% private, runs entirely in your browser.
Drag & drop your images here
or click to upload • JPG, PNG, WEBP • up to 5 images
Takes less than 5 seconds
Why use Lumina?
Most watermark removers guess at the pixels beneath the mark. Lumina uses the exact formula Gemini used — so the result is mathematically precise.
100% Private
Your images never leave your device. All processing happens locally in your browser.
Under 5 seconds
No server round-trip. Processing is near-instant on any modern device.
Lossless output
Only the watermark region is touched. Everything else is pixel-perfect.
Works everywhere
Desktop, tablet, mobile — any browser, no app or extension required.
How it works
Upload your image
Select or drag in your Gemini image. JPG, PNG, and WebP supported.
Automatic watermark removal
Reverse alpha-blending reconstructs the original pixels beneath the star. Nothing to configure.
Download lossless PNG
Your clean image is ready instantly. No quality loss, no compression.
Frequently Asked
Is this Gemini watermark remover really free?
Yes, completely free. No account, no subscription, no hidden fees. Use it as many times as you need.
How is this different from other watermark removers?
Most tools use inpainting AI that can distort surrounding pixels. Lumina uses the exact reverse alpha-blending formula Gemini used to add the mark — so the reconstruction is mathematically precise.
Does it work on all Gemini images?
Yes, for any image exported directly from Google Gemini. The tool supports both small (48px) and large (96px) watermark sizes automatically.
What if my image doesn't have a watermark?
The tool detects whether a Gemini watermark is present before processing. If none is found, you'll see a clear message instead of a corrupted result.
Does it remove SynthID?
No. SynthID is an invisible watermark embedded in pixel data — it cannot be removed or detected by any visual tool, including this one.