YouTube Thumbnail Size
Recommended YouTube thumbnail size is 1280 x 720 pixels in a 16:9 ratio.
Spec sheet
- Recommended size
- 1280 x 720 px
- Aspect ratio
- 16:9
- Minimum size
- 640 x 360 px
- Max file size
- 2 MB
- Accepted formats
- JPG, PNG, GIF, BMP
YouTube thumbnail best practices
YouTube thumbnails are often the most important click driver for a video, which is why this keyword has sustained search demand. While dimension accuracy prevents distortion, composition determines performance. Keep faces and key words centered because interfaces can crop edges in some placements and devices.
Use high contrast text, avoid tiny labels, and keep file size well under the 2 MB limit for faster upload and preview generation. If you produce at scale, build one template system with safe-area guides so every episode or campaign remains visually consistent.
Mistakes to avoid
- Uploading below 640 x 360 — YouTube rejects thumbnails under the minimum resolution outright.
- Using text smaller than about 40px tall at 1280x720 — it becomes unreadable once YouTube displays the thumbnail at typical feed sizes (roughly 168x94px on mobile).
- Forgetting the video length badge in the bottom-right corner — busy artwork placed there gets partially obscured on every platform surface.
FAQ
Does a higher resolution than 1280x720 help?
Not meaningfully — YouTube displays thumbnails well below that size in most placements. 1280x720 is the sweet spot for clarity without wasting file size.
Can I use a 9:16 vertical thumbnail for Shorts?
Yes — Shorts use a 9:16 cover pulled from the video itself rather than a custom 16:9 thumbnail. See the 9:16 aspect ratio guide for that format's safe-area rules.