Video Thumbnail

Automatically capture multiple frames from a video and combine them into a single thumbnail grid (contact sheet), with customizable rows, columns, thumbnail width, and optional per-frame timestamps.

🖼️

Drop a video or click to upload

MP4, WebM, MOV, AVI

What Is a Video Thumbnail?

The Video Thumbnail tool captures multiple frames from a video and merges them into one large grid image, commonly used for video covers, index pages, or content overviews.

All frame capture and compositing happens locally in your browser.

How to Use

Generate a thumbnail grid in three steps:

  • Upload a video (MP4, WebM, MOV, AVI, etc.).
  • Set the number of rows, columns, and thumbnail width; enable timestamps if needed.
  • Click Generate to preview, then download the PNG image.

Tips

  • 3 rows × 4 columns (12 frames) suits most videos.
  • Enabling timestamps helps you quickly locate the shot you're looking for.
  • Not happy with the layout? Adjust the rows and columns and generate again.

Frequently Asked Questions

What is a thumbnail grid?+
A thumbnail grid (contact sheet) arranges multiple frames of a video into rows and columns on a single image, so you can quickly overview the video's content.
How are the frames selected?+
Frames are distributed evenly across the whole video. For example, 3 rows × 4 columns gives 12 frames captured at equal intervals from start to finish.
Can timestamps be displayed?+
Yes. When Show Timestamps is enabled, each frame is labeled with its time position (minutes:seconds) in the video.
What format is the generated image?+
The output is a PNG image whose dimensions depend on the rows, columns, and thumbnail width. Download it for use as a video cover or index page.

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Video Thumbnail — free online video thumbnail, video screenshot, thumbnail grid, contact sheet, video preview, video thumbnail generator. No signup required. Works in your browser.