YouTube Thumbnail Downloader

Link formats this page accepts

• youtube.com/watch?v=VIDEO_ID — extra parameters such as &t= or &list= are ignored
• m.youtube.com/watch?v=VIDEO_ID — the mobile host
• youtu.be/VIDEO_ID — the short link, with or without ?t=
• youtube.com/embed/VIDEO_ID — the embed link
• youtube.com/shorts/VIDEO_ID
• youtube.com/live/VIDEO_ID
• youtube.com/playlist?list=…&v=VIDEO_ID — the v= video is used
• A bare 11-character video ID, e.g. dQw4w9WgXcQ

Two kinds of link are recognised but cannot produce a thumbnail: a playlist link without a v= video, and any channel link (/@handle, /channel/…, /c/…). Neither has a single thumbnail of its own. The page tells you so instead of guessing.

Thumbnail sizes

YouTube serves a fixed set of thumbnail files per video. Which of them exist depends on the video itself. This page asks the image server for each one, and lists only the files that came back with HTTP 200 — then measures the pixels of the file it received. The size on each card is the real one, not an assumed one.

Measured on 2026-09-21 against four public videos (dQw4w9WgXcQ, 9bZkp7q19f0, kJQP7kiw5Fk, jNQXAC9IVRw) by downloading each file and reading its header. Nothing in that set measured 1920 × 1080. If YouTube serves a larger file for the video you paste, the card shows that larger number — the card is never filled in from this table.

WebP versions of these files exist on YouTube's image host, but they are served without CORS headers, so a browser page cannot reliably check whether one exists or hand it to you as a file. Rather than list a format it cannot verify, this page lists the JPG set only.

How it works

1. The video ID is read out of the link you paste.
2. Each thumbnail file is requested from img.youtube.com. YouTube answers missing resolutions with HTTP 404 plus a grey 120 × 90 placeholder image, so the status code — not the picture — decides what is listed.
3. Every file that came back is decoded in your browser and measured. Two files with identical pixel dimensions are listed once.
4. Download saves the bytes the page already fetched; Copy link puts the direct img.youtube.com URL on your clipboard.

No upload, no account, no history, no batch queue, and no charge: this YouTube thumbnail tool is free and needs no sign-up. Your link never leaves the browser tab except for the two requests above, and the file you save is the one the server sent — nothing is added on top of it.

Guides

• Thumbnail size — every pixel size that came back
• File size — what the files weigh, and the upload limits
• Resize — fetching a size vs inventing one
• Viewer — which file it shows you
• Not loading — six causes, six checks
• The URL — the address, part by part
• Change a thumbnail — the steps and the real spec
• Shorts — the upright file has its own name
• Playlists — no playlist file, only the videos inside
• Channel art vs thumbnails — two servers, two formats
• Hover preview — a signed animation, not the thumbnail
• Cache and the old picture — two hours, one tag for six files
• CORS and reading pixels — jpg yes, webp no
• maxres1, maxres2, maxres3 — four 1280-wide files, not one
• Embed thumbnail — the 480 × 360 file every card uses
• Saver — why your saved files collide
• Bulk and whole channels — thirty IDs a page, then a POST
• HD resolutions — what 720p and 1080p actually mean here
• Which file you get — two names, one identical file
• Maxresdefault not working — how often it is missing
• Verify a download — real file or the placeholder
• Extractor — the 11 characters that must be found
• Get a thumbnail — every link shape, and case
• Download a thumbnail — the whole routine
• On a phone — what differs on mobile
• Grabber — paste, pick, save
• YouTube thumbnail grabber — the file names explained
• YT downloader — short links and IDs
• Can you use it? — what the terms say, quoted
• Measured dataset — the raw CSV runs behind these numbers