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Gemini Watermark Remover

Remove Google's sparkle watermark from Gemini-generated images — auto-detects 48/96px marks and reverses alpha blending locally. Single images free; batch mode Pro-only.

Runs on CanvasJSZip

100% Local Browser Native

How to Use the Gemini Watermark Remover

1. Upload Gemini Images

Select one or more images generated by Gemini AI that contain the visible sparkle watermark in the bottom-right corner.

2. Auto-Detect & Remove

The tool auto-detects 48×48 or 96×96 watermark sizes based on image dimensions, then mathematically reverses the alpha blending to recover original pixels.

3. Download Clean Images

Preview the watermark-free result, then download individually or as a ZIP batch. All processing is 100% client-side — nothing is uploaded.

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Frequently Asked Questions

How does Gemini watermark removal work?

Gemini AI stamps a small sparkle mark in the bottom-right corner. Images larger than 1024×1024 get the 96px alpha map with 64px margins, smaller ones the 48px map with 32px margins (assets load from /assets/gemini-alpha-48/96.png); each pixel inverts as original = (watermarked − alpha×255)/(1−alpha) with a 3/255 noise floor and 0.99 alpha cap. Position override and crop-box modes handle off-corner marks.

Does it work on other watermarks?

No — only Gemini's sparkle mark, whose exact blending is known. Stock-photo watermarks, logos, and text overlays need manual clone work; this tool refuses them rather than smudging.

What is batch mode?

Pro-only multi-file removal with queue controls and ZIP output. Single images stay free for everyone with no account and no credits.

Does watermark removal upload images?

No — detection and reversal run entirely in your browser. Nothing leaves your device; saves download with no quota.

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Last updated October 2026