Guide
YouTube Thumbnail Size & Resolutions Explained (2026 Guide)
The correct YouTube thumbnail size is 1280×720 (16:9), under 2MB. Full breakdown of upload specs, CDN resolution tiers, Shorts, and text safe zones.
Getting the thumbnail size right matters for one simple reason: a mis-sized image gets cropped, stretched, or rejected. Here’s the complete, current breakdown of YouTube thumbnail dimensions — for uploading your own and for understanding the sizes you download.
The correct upload size
YouTube’s official recommendation for a custom thumbnail:
- Resolution: 1280×720 pixels
- Aspect ratio: 16:9 (the standard for regular videos)
- Minimum width: 640 pixels
- Max file size: 2 MB
- Formats accepted: JPG, PNG, GIF, BMP (YouTube serves them all back as JPEG)
Design at 1280×720 and you’ll never be cropped on a standard video. If your image is the wrong shape, resize it to 16:9 before uploading — and preview it first with the thumbnail tester to see exactly how it reads across YouTube.
Every resolution YouTube serves
After upload, YouTube generates a fixed set of sizes on its CDN. When you download a thumbnail, these are what’s available:
| Name | File | Pixels | Notes |
|---|---|---|---|
| Max res | maxresdefault.jpg |
1280×720 | The HD master — best quality, not on every video |
| Standard | sddefault.jpg |
640×480 | 4:3 letterboxed |
| High | hqdefault.jpg |
480×360 | Always available |
| Medium | mqdefault.jpg |
320×180 | 16:9 |
| Default | default.jpg |
120×90 | Playlists, strips |
maxresdefault (1280×720) is the ceiling — there is no 1080p or 4K thumbnail tier, no matter what some tools claim. The full explanation is in Can you download a 4K YouTube thumbnail?, and the exact URLs are in how to get a thumbnail URL.
Shorts are different (9:16)
YouTube Shorts are vertical, so their thumbnails use a 9:16 ratio (e.g. 1080×1920) rather than 16:9. If you’re working with Shorts, treat them separately — grab and study them with the Shorts thumbnail downloader.
Safe zones: keep text away from the corners
Your thumbnail is displayed at many sizes, and two areas get covered:
- Bottom-right corner — the video duration badge sits here. Keep important text and faces out of it.
- All four edges — different surfaces crop slightly. Keep key elements within the central ~90%.
Because the same image shrinks to a tiny sidebar strip and a full-width mobile card, the real test is legibility at small sizes. Load your design into the thumbnail tester and check the mobile and sidebar views — if the text isn’t readable there, simplify it.
File format: JPG, PNG or WebP?
- JPG — smallest files; YouTube converts everything to JPEG anyway, so it’s the safe upload choice.
- PNG — best when you need crisp text or transparency in your working file; download existing thumbnails as PNG via download as PNG.
- WebP — great for web use elsewhere; see download as WebP.
Frequently asked questions
What is the best YouTube thumbnail size? 1280×720 pixels at 16:9, under 2 MB.
Is 1280×720 the same as 720p? Yes — 1280×720 is 720p HD, and it’s the maximum YouTube stores for thumbnails.
What size are YouTube Shorts thumbnails? Vertical 9:16 (around 1080×1920), unlike the 16:9 of regular videos.
How do I know my thumbnail looks good before uploading? Preview it in real YouTube layouts with the thumbnail tester.