YTDetective

Tools / YouTube Thumbnail Downloader

YouTube Thumbnail & Channel Image Downloader

Save a channel avatar or a video thumbnail in full resolution from the public source URLs YouTube exposes.

Generate a download link for the public thumbnail or channel profile image.

Preview

TypeChannel avatar
Resolution800 × 800
Report a bug or suggest an improvement

How this works

YouTube serves several thumbnail sizes for every video, from maxresdefault (1280 × 720) down to mqdefault (320 × 180) — but the largest ones only exist for videos uploaded at high enough source resolution. This tool checks from largest to smallest and returns the biggest one that actually exists, labelled with its real resolution rather than assuming 1280 × 720.

For a channel URL, it's the channel's public avatar image at whatever resolution YouTube currently serves — not a video thumbnail.

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