Built for Pixel-Exact Gemini & Veo Watermark Restoration
UnWatermarkGemini is a specialized mathematical restoration studio designed to remove the visible bottom-right star watermark from Google Gemini images (Gemini 2.5 Flash, Gemini 3.x, Imagen 3) and Veo 3 video clips. Rather than blurring or repainting corners with AI guesswork, our tool reverses the exact alpha-blending formula directly inside your browser.
Zero files ever uploaded to any remote server.
Instant inverse alpha unblending in Canvas 2D.
Matches official 1K (-32px) and 2K (-64px) tiers.
Accessible interface for creators worldwide.
Why We Built UnWatermarkGemini
When designers, educators, and developers export visual concepts from Google Gemini or short video clips from Veo 3, a semi-transparent white four-point star overlay is composited onto the bottom-right corner.
Most online watermark removers treat this badge like a solid obstacle—uploading your private media to a remote server and running a diffusion inpainter that destroys underlying details, smears text, and introduces noticeable blur.
Because the Gemini star overlay is semi-transparent (α ≈ 0.502), the original pixel values are never destroyed—they are merely shifted toward white (255). By calibrating high-precision alpha maps for every official Gemini and Veo resolution tier, our tool algebraically solves for the exact original RGB channels locally in your browser.
The 4-Stage Local Restoration Pipeline
- 1Resolution & Candidate Detection: Evaluates spatial correlation and gradient edges to lock onto the exact 48×48 or 96×96 bottom-right ROI.
- 2Adaptive Alpha Calibration: Matches the embedded star alpha gradient mask and refines gain for sub-pixel alignment.
- 3Inverse Alpha Unblending: Computes
(W − α·255) / (1 − α)per RGB channel while leaving 99% of the canvas untouched. - 4Contour & Temporal Polish: Applies optional 3×3 bilateral/DnCNN edge smoothing for JPEG artifacts and 3-frame temporal median filtering for video clips.
Offline-Ready Design: Once this page loads, you can disconnect from Wi-Fi and continue cleaning images and videos locally.
Core Capabilities of Our Studio
Every feature is engineered specifically for Google Gemini image generations and Veo 3 video clips.
Deterministic Reverse Alpha Math
Instead of guessing background pixels with generative AI inpainting, our engine algebraically inverts the exact compositing formula Original = (Watermarked − α × 255) / (1 − α) to recover the true underlying RGB values.
Multi-Tier Image & Batch ZIP Studio
Automatically detects 48×48px (1K standard) and 96×96px (2K high-resolution) bottom-right Gemini star overlays across JPG, PNG, and WebP files, with instant batch ZIP export and a Live Alpha & Offset Tuner.
Frame-by-Frame Veo 3 Video Engine
Powered by browser WebCodecs and Mediabunny, our video cleaner locks onto watermark anchors across timestamps, applies 3-frame temporal median smoothing, and remuxes clean MP4s with untouched original audio.
100% Browser-Local Privacy
Your photos and videos never leave your computer or phone. Every calculation runs inside volatile browser RAM using HTML5 Canvas and Web Workers—verifiable anytime in your browser Network tab.
Interactive Live Tuner & Edge Polish
For cropped screenshots or social-media recompressed JPEGs, fine-tune Peak Alpha (α), X/Y corner offsets, 3×3 bilateral chroma filtering, and DnCNN contour repair with a 4× pixel inspection loupe.
Userscript & Node.js CLI Ecosystem
Beyond the web studio, automate your workflow with our Tampermonkey Userscript for live gemini.google.com pages or run our zero-install CLI tool for local folder batches and large 4K video files.
How Our Tool Compares to Generic AI Watermark Erasers
Why mathematical inverse compositing outperforms cloud-based AI object inpainting on Gemini and Veo media.
| Capability | UnWatermarkGemini | Generic Cloud AI Erasers |
|---|---|---|
| Restoration Method | Exact algebraic inverse alpha unblending | Generative AI hallucination / blur inpainting |
| Corner Pixel Fidelity | Recovers original grain, sharp edges & typography | Smudges fine details and invents synthetic textures |
| File Privacy & Security | 100% local in browser RAM (zero server uploads) | Uploads private photos & videos to remote cloud GPUs |
| Processing Speed | ~1 millisecond per image; hardware WebCodecs for video | 5–30 seconds waiting in remote server queues |
| Cost & Account Rules | 100% free, unlimited batch ZIP & MP4 exports, no login | Paywalled credits, watermarked trials, mandatory sign-up |