YouTube Thumbnail Size Guide
A practical thumbnail export target is 1280 x 720 pixels, which gives you a 16:9 image that can scale down cleanly across desktop cards, mobile feeds, and tiny recommendation slots.
Fast checklist
- Export in a 16:9 ratio, commonly 1280 x 720 pixels.
- Make the main subject readable when the image is only 120px wide.
- Use a few large words instead of a sentence.
- Keep faces, objects, and important text away from the outer edge.
- Check both dark and light backgrounds if your thumbnail has transparent or pale edges.
Preview sizes worth checking
| Preview | Size | What to inspect |
|---|---|---|
| Export canvas | 1280 x 720 | Overall composition, crop safety, and image quality. |
| Desktop card | 320 x 180 | Whether the subject and title still read in a normal recommendation card. |
| Mobile feed | 180 x 101 | Whether faces, text, and high-contrast edges survive on a small screen. |
| Tiny glance | 120 x 68 | Whether the idea is understandable without zooming in. |
Common thumbnail mistakes
The most common issue is designing for the full-size canvas instead of the feed. Dense backgrounds, thin fonts, low-contrast text, and too many small elements often look acceptable at 1280px but fall apart at 120px.
Open the thumbnail checker to preview your image at all four sizes.