Video Thumbnail Generator

Extract HD cover posters, generate storyboard contact sheets, and download thumbnail images. 100% private in-browser.

🖼️

Drag & Drop a video here

or click to browse (MP4, WebM, MOV, MKV)

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Frequently Asked Questions

What resolution are the generated video thumbnails?

Thumbnails are generated at the exact native resolution of the source video (e.g. 1920×1080 for 1080p, 3840×2160 for 4K) so your covers remain razor-sharp.

Can I add a title or play icon overlay to the thumbnail?

Yes. You can optionally type a custom title overlay and toggle a play button badge to preview and export ready-to-use YouTube, blog, or social media video covers.

What is the Storyboard Contact Sheet feature?

The contact sheet captures a 3×3 or 4×3 grid of evenly spaced scenes across your video into a single high-resolution poster image, complete with timestamp labels and video metadata.

Are my videos uploaded to any external server?

No. The entire process runs strictly client-side inside your web browser using HTML5 Canvas. Your media never leaves your device.