The standard YouTube thumbnail size is 1280×720 pixels (16:9). Below is every resolution YouTube serves, the minimums, how Shorts differ, and a free tool to check any video's thumbnail sizes in one paste.
The short answer, then the full breakdown.
A YouTube thumbnail is 1280 × 720 pixels at a 16:9 horizontal aspect ratio. That is the size YouTube recommends you upload as a custom thumbnail, and it is the size YouTube displays on the watch page, in search results, on the home feed, and next to related videos. Because the player itself is 16:9, a 1280×720 image lines up edge to edge with no cropping.
The minimum YouTube will accept for a custom thumbnail is 640×360, but that floor is rarely worth using — on a high-DPI phone or a Retina display, a 640×360 image looks visibly soft and the platform upscales it. Always export at the full 1280×720. Keep the file under 2 MB (YouTube rejects anything larger), and prefer PNG when the thumbnail has crisp text or a logo, since JPG compression blurs sharp edges.
YouTube serves five thumbnail sizes per video. Here is what each one is and where it shows up.
| Resolution | Dimensions | Aspect | Always exists? | Used for |
|---|---|---|---|---|
| Maxres HD |
1280 × 720 px | 16:9 | No — missing on some videos | Custom thumbnail, watch page, HD embeds |
| SD | 640 × 480 px | 4:3 | Usually | Medium-quality embeds |
| HQ | 480 × 360 px | 4:3 | Yes — always present | Default thumbnail, fallback when maxres is missing |
| MQ | 320 × 180 px | 16:9 | Yes | Search results, related-video strips |
| Default | 120 × 90 px | 4:3 | Yes | Tiny inline previews |
The one that matters most is maxresdefault at 1280×720 — that is the file YouTube uses as your custom thumbnail when you upload one. The catch: it is not generated for every video. Older uploads, auto-generated channels, and some Shorts lack a maxresdefault entirely, and YouTube falls back to hqdefault (480×360), which is the one size that is always present for every video. If you have ever pasted a YouTube link into a downloader and only got 480×360 back, this is why — the 1280×720 version simply does not exist for that video.
Want to confirm which sizes a specific video has? Paste its URL into the checker below — it pulls all five resolutions at once so you can see exactly what is available.
Paste a YouTube link to see all five resolutions side by side, with exact pixel dimensions. Runs in your browser — nothing is uploaded.
Shorts are vertical, so their thumbnails are vertical too. Do not reuse a 1280×720 image for a Short.
A YouTube Shorts thumbnail is 1080×1920 pixels at a 9:16 vertical aspect ratio — almost twice as tall as the regular 1280×720 thumbnail is wide. Shorts are watched in a full-screen, swipe-up vertical feed, so a horizontal 1280×720 image gets cropped on the left and right, and your subject can end up sliced in half. If you are making a Short, use 1080×1920.
For the full Shorts breakdown — exact dimensions, minimum, and a free 1080×1920 cover maker — see our dedicated YouTube Shorts thumbnail size guide.
Three steps from a video link to a 1280×720 image file.
Grab any youtube.com/watch?v=…, youtu.be/…, /shorts/…, /embed/… or /live/… link from the address bar or share button.
Paste the link into the YouTube Thumbnail Downloader on the home page. It pulls all five resolutions in one go.
Click Download on the Maxres (1280×720) card. If maxres is missing for that video, grab HQ (480×360) instead — it is always there.
More from ThumbGrab.
Paste any video link and download every resolution — 1280×720 HD down to 120×90 — in one click.
Open downloader →The vertical Shorts thumbnail dimensions, with a free 1080×1920 cover maker for any video.
Open Shorts guide →Turn a thumbnail into a custom, on-brand 1280×720 YouTube cover with your own title and colors.
Open enhancer →Quick answers to the most common questions about YouTube thumbnail dimensions.
640×360 pixels, but the recommended size is 1280×720. A 640×360 image will look soft on high-DPI screens and may be upscaled, so always export at the full 1280×720 when possible.1080×1920 pixels at a 9:16 vertical aspect ratio — different from the regular 1280×720 horizontal thumbnail. Shorts are watched in a vertical feed, so the thumbnail has to be vertical too. See our Shorts thumbnail size guide for the full breakdown.maxresdefault file when a creator uploads a custom HD thumbnail, so videos without one are stuck at the smaller hqdefault, which is always 480×360. This commonly affects videos uploaded before 2013, auto-generated topic and music channels, Shorts recorded on a phone with no custom cover, and many Live replays, because none of those flows produce a maxres asset. When you request maxresdefault.jpg for one of these videos, YouTube returns a 404 and the player silently falls back to hqdefault, which is only 480×360 (a quarter of the area of 1280×720) and looks visibly soft on modern Retina, 4K, and large desktop screens. That is why a thumbnail that looks crisp on the watch page can look blurry when downloaded — you are actually grabbing hqdefault. Paste the URL into the checker above to see exactly which resolutions a given video has, then download the largest one.