Engineered specifically for narrated slide decks, visual summaries, and MP4 exports from Gemini Notebook Video Overviews and NotebookLM. Our bright-background luminance calibration removes the corner overlay cleanly without softening presentation text, charts, or AI narration.
Drop your Gemini Notebook or NotebookLM Video Overview MP4 here
Optimized for high-luminance slide backgrounds & diagrams · Preserves dual-host AI voiceover audio
Presentation and Notebook Video Overviews typically use light or white backgrounds where standard watermark erasers leave a gray smudge. Our local luminance detector solves this mathematically:
Choose your exported Video Overview MP4 file. Everything runs inside your local browser memory so confidential research documents and slides never leave your computer.
Our adaptive contrast curve detects high-luminance slide backgrounds (L > 200) and boosts interior diamond recovery so fine chart lines and footnote text stay razor-sharp.
Save your restored MP4 with 100% of the original AI voiceover track preserved—ready for client decks, lectures, or YouTube uploads.
Blurring the bottom-right corner of a slide deck ruins page numbers, citations, and chart legends. Inverse alpha math restores the exact pixels:
| Comparison Criterion | UnWatermarkGemini (Notebook Engine) | Blur Box / Slide Crop | Cloud Video Eraser |
|---|---|---|---|
| Slide Text & Chart Legibility | Keeps vector-like slide text & gridlines crisp | Smears page numbers and lower-right labels | Warps straight diagram lines during transitions |
| Bright / White Slide Backgrounds | Adaptive high-luminance contrast boost (zero gray halo) | Leaves visible darker gray box against white slides | Often leaves discolored off-white patches |
| Confidential Document Privacy | 100% browser-local (research & internal decks stay private) | Local manual editing | Uploads confidential slide video to third-party cloud |
Our Notebook Overview profile combines low-contrast ring detection with lossless audio pass-through:
When a white sparkle is blended over a light slide (ΔL < 25), our adaptive contrast gain accurately separates the watermark alpha from the background.
LowContrastGain: 1.08× Interior Alpha CurvePreserves the exact vocal clarity of Gemini Notebook and NotebookLM audio hosts without transcoding artifacts.
AudioTrack: Bit-Exact Demux/RemuxNeed to clean exported PNG/JPG slide thumbnails? Switch the toggle above to Images mode for <50ms lossless restoration.
1408×768 → 48×48px @ (X: 1328, Y: 688)Common questions from educators, researchers, and teams cleaning Gemini Notebook Video Overviews.
Most Notebook Video Overviews feature bright white or cream slide backgrounds where the white Gemini watermark has very low contrast. Generic blur tools smear neighboring dark text into the white background, whereas our luminance-calibrated inverse alpha math restores the true background color.
Yes. UnWatermarkGemini executes 100% inside your local web browser. No video frames, audio tracks, or slide contents are ever transmitted to any server.
Yes, frame timestamps and the original audio stream are kept in exact synchronization.
Each UnWatermarkGemini tool page is calibrated for a distinct Google AI watermark format, resolution tier, or developer workflow:
Lossless drag-and-drop image & video reverse alpha tool
Frame-by-frame browser MP4/WebM cleaner preserving audio
Zero-blur Veo 3 / 3.1 video restoration vs Vmake & Reel.Money
48×48px & 96×96px Gemini 2.5 Flash Image star unblending
Multi-scene cinematic Google Flow MP4 export cleaner
High-luminance slide & NotebookLM Video Overview restoration
Tampermonkey auto-hook & terminal batch CLI automation
1024×1024, 1408×768, 768×1408 & 2K offset lookup tables
Algebraic compositing inversion formula & zero-upload audit