YouTube Thumbnail Grabber

A YouTube thumbnail grabber fetches the static preview images that YouTube publishes for every video and lets you download them in each available size. The thumbnails are publicly hosted at predictable URLs under img.youtube.com, so no API key or authentication is needed. Paste a video URL or ID, and the tool displays every resolution the platform exposes so you can save the one that fits.

YouTube publishes five standard auto-generated sizes. Max resolution (maxresdefault.jpg) is 1280×720 and is the clearest option — but it's missing for videos uploaded before May 2010, some private videos, and some channel-reserved ones. Standard definition (sddefault.jpg) is 640×480 and always available. High quality (hqdefault.jpg) is 480×360 in a 4:3 frame. Medium quality (mqdefault.jpg) is 320×180 in 16:9. Default (default.jpg) is the 120×90 small thumbnail used in the YouTube sidebar.

On top of those auto sizes, YouTube also publishes three numbered frame captures at 0.jpg, 1.jpg, 2.jpg, and 3.jpg — frame 0 is essentially the preview frame, and 1–3 are sampled from roughly the start, middle, and end of the video. These are useful when the creator's chosen thumbnail does not suit your purpose (for example, you're writing a tutorial and want a frame that shows the step being discussed rather than a clickbait face).

URL parsing covers every format YouTube uses: the classic desktop watch?v=, the short youtu.be/, the /embed/ route, and the newer /shorts/ path for vertical video. You can also paste the raw 11-character video ID and the tool detects it.

Legal note: thumbnails are the creator's copyrighted content. Fair use varies by jurisdiction but generally supports commentary, criticism, research, and news reporting. If you're publishing a thumbnail in a competitive context (a competitor teardown, a screenshot in a review), label the source clearly. For commercial use outside of fair use (packaging, ads, stock archives), get the creator's permission.

Privacy: the tool runs entirely in your browser. The only network traffic is the browser loading the image from YouTube's CDN — the same traffic that happens when you visit the video page. We never see which videos you look up.

1. Paste a YouTube URL. Any format works (watch, youtu.be, shorts, embed).
2. Review the sizes. Max resolution first; fall back to SD if max is blank.
3. Copy the URL or save the image. URL copy is useful for embeds; Save downloads the JPEG.
4. Check frame captures if the chosen thumbnail doesn't suit — one of 0.jpg…3.jpg often works better.

• All five auto-generated sizes from maxresdefault down to the 120×90 default.
• Four frame captures (preview, start, middle, end).
• URL parsing for watch, youtu.be, shorts, embed, and raw video IDs.
• One-click URL copy and image download (with safe fallback).
• Runs in your browser — no server round-trip, no tracking.