MultiKit

YouTube Thumbnail Downloader: Save Any Video's Thumbnail

  • Free
  • No sign-up
  • Version 1.0.2
  • Last updated 2026-10-25
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Paste a YouTube video link (or just its id) and this checks every thumbnail size YouTube keeps for it, from the full-resolution one down to the small default, and shows which ones are real so you only download a size that exists.

How to use

  1. Paste a YouTube link, such as a watch, youtu.be, Shorts or embed link, or just the 11-character video id, into the box.
  2. Press Find thumbnails. Each size is fetched directly from YouTube's own image server and checked.
  3. A size that exists shows its real image; a size that doesn't shows "Not available for this video" instead of a broken or wrong picture.
  4. Press Download under any size you want to save it as a .jpg.

Examples

https://www.youtube.com/watch?v=dQw4w9WgXcQ
→ Five sizes checked: max resolution, standard, high, medium and default
Shorts, youtu.be and embed links work the same way; only the video id inside them matters.
An older or low-resolution video, where YouTube never generated a 1280×720 thumbnail
→ Max resolution shown as "Not available for this video", the smaller sizes shown normally
YouTube answers a missing size with a small gray placeholder image rather than an error; this tells the two apart before showing anything, rather than downloading that placeholder by mistake.

How it works

A YouTube video id resolves to a handful of fixed image URLs on YouTube’s own i.ytimg.com server, one per size, and that server allows this page to fetch them directly (it sends an open CORS header), so no server of ours sits in between. When a size was never generated for a video, YouTube answers with a 120×90 gray placeholder at the same 200 status as a real image rather than an error, so each fetched image is checked against that exact size (every size other than the one meant to be 120×90 itself) before it is shown or offered for download, rather than trust the response code alone.

Sources

Frequently asked questions

Does this work for Shorts and unlisted videos?
Shorts links work the same as regular ones. An unlisted video's thumbnail can still be fetched if you have its link, since YouTube's thumbnail images do not check whether a video is public; a private video's thumbnail is not reachable at all.
Why does "max resolution" sometimes say it's not available?
YouTube only generates that size for videos uploaded at a high enough resolution, generally 720p or above. Older or lower-resolution videos only have the standard size and below, and the page checks for this rather than offer a size that would download YouTube's gray placeholder image instead.
Is the video itself downloaded, or just the thumbnail picture?
Just the thumbnail. This only fetches YouTube's own preview image for the video; it never touches the video file.
Is my link sent anywhere other than YouTube?
No. The video id is read in your browser, and the only requests made are straight to YouTube's own image server to fetch and check each thumbnail.
Version history
  • 1.0.2 — Clarifies the search title with the tool's main task and whether it is free or runs online.
  • 1.0.1 — Corrects the privacy notice: thumbnail requests send the video ID to YouTube's image server.
  • 1.0.0 — First release.

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