YouTube Thumbnail Size Checker
Upload your thumbnail and instantly check if it meets YouTube's requirements for resolution, aspect ratio, file size, and format.
Drop your thumbnail here or click to upload
JPG, PNG, WebP — any size
YouTube Thumbnail Size Guide
YouTube displays your thumbnail at different sizes across the platform. Upload at 1280×720 so it looks sharp everywhere.
| Where It Appears | Display Size (px) | Notes |
|---|---|---|
| Home Feed | 360×202 | Most common placement — first impression |
| Search Results | 360×202 | Shown next to title and metadata |
| Suggested Sidebar | 168×94 | Smallest display — text must be large |
| Channel Page | 360×202 | Grid layout on your channel |
| Notifications | 120×67 | Tiny preview in notification bell |
| Watch Later / Playlist | 160×90 | Small list thumbnails |
| Embedded Player | Varies | Before play button — full resolution ideal |
Need a Better Thumbnail?
Generate optimized thumbnails with AI or preview yours in real YouTube layouts.
Frequently Asked Questions
What is the ideal YouTube thumbnail size?
1280×720 pixels (16:9 aspect ratio). YouTube requires a minimum width of 640px. Keep file size under 2 MB for fastest loading.
What formats does YouTube accept?
JPG, PNG, GIF, and WebP. JPG is recommended for photos, PNG for graphics with text overlays.
Why does my thumbnail look blurry?
Usually because the source image is below 1280×720. YouTube displays thumbnails at various sizes — upload at full resolution so it stays sharp everywhere.
Does this tool upload my image anywhere?
No. The check runs entirely in your browser. Your image never leaves your device.
What happens if my thumbnail fails a check?
Use ThumbBoost's AI generator to create a properly-sized thumbnail, or resize your image to 1280×720 before uploading to YouTube.