Tools / Create / Thumbnail Maker
Create Runs in browser
Thumbnail Maker.
Capture and export polished thumbnails.
✓ Your videos never leave your device✓ 100% local processing✓ No uploads✓ No account
Processed locally — no upload. Thumbnail Maker runs entirely in your browser. Large files use more memory and processing time depends on your device. Re-encoded video is exported as WebM here (MP4 requires cross-origin isolation, e.g. a production deploy in Chrome/Firefox).
Drop your video here
or click to browse — MP4, WebM, MOV, MKV, M4V
Files stay on your device · nothing is uploaded
Settings
Load a video to configure thumbnail maker.
Privacy first100% local processing
Create a thumbnail from your best video frame
Thumbnail Maker captures a clear still image from a selected moment in your recording.
Use it for video covers, previews, lessons, presentations, social posts or website images.
The recording remains on your device.
100% local processing
Your videos never leave your device.
VideoDock processes your files inside the browser tab. Nothing is uploaded to a VideoDock processing server, stored in the cloud or sent to a third-party video processing service.
✓ No video uploads
✓ No account required
✓ Local browser processing
✓ Privacy-first by design
HowSimple workflow
How to use Thumbnail Maker
- Choose the source video.
- Find the best frame in the player.
- Pause on the selected image.
- Create the thumbnail locally.
- Download the PNG result.
FormatsBrowser compatible
Supported formats
Input is a browser-supported video. The final thumbnail is exported as PNG.
→PNG
?Thumbnail Maker FAQ
You can capture a frame and then use the PNG as the basis for a YouTube thumbnail.
No. The image is created and downloaded locally.
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