How does auto vs manual frame selection work?

Auto mode analyzes the video and extracts frames at key intervals, selecting frames with good exposure, sharpness, and visual interest. Manual mode lets you scrub to any timestamp and capture exactly the frame you want. For most use cases, grab several auto-selected frames and then manually pick the best one.

What resolution are the output thumbnails?

Thumbnails are extracted at the full resolution of your source video. A 1080p video produces 1920x1080 thumbnails. A 4K video produces 3840x2160 thumbnails. The output format is PNG for maximum quality — you can convert to JPG later if you need a smaller file size.

Video Thumbnail Generator

Generate thumbnail images from your video. Auto-select the best frames or pick manually from any timestamp — download as high-quality PNG.

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Comment utiliser — Video Thumbnail Generator

Upload your video

Drag and drop any video file (MP4, WebM, MOV, AVI) or click to browse. The video loads locally in your browser.

Select your frames

Use auto-selection for smart picks at key moments, or manually scrub to any timestamp and capture the exact frame you want.

Download as PNG

Download your selected thumbnails as high-quality PNG images at the full resolution of your source video.

Questions Fréquentes

What is the best thumbnail size for YouTube?

YouTube recommends 1280x720 (16:9) with minimum 640px width, under 2 MB. This tool outputs full-resolution frames — use 1080p+ source video for best results.

Auto vs manual frame selection?

Auto mode extracts well-distributed frames with good exposure and sharpness. Manual mode lets you scrub to any timestamp. Best approach: grab auto frames, then manually pick the winner.

What resolution are the thumbnails?

Full source resolution — 1080p video gives 1920x1080 thumbnails, 4K gives 3840x2160. Output is PNG for maximum quality; convert to JPG later if needed.

How many frames can I extract?

As many as you need. Auto mode generates a set across the video duration. Manual mode captures one at a time from any point. All download as individual PNG files.