Guide
YouTube Shorts thumbnails: 16:9 files, 9:16 screens
Shorts look vertical. The custom thumbnail YouTube hosts is usually the same 16:9 family as long-form. Design the middle, or the shelf will crop your punchline.
Same ID, same filenames
youtube.com/shorts/ID is a player skin around the same video object as watch?v=ID. maxresdefault.jpg is still the HD still when it exists. The Shorts downloader frames that file in 9:16 so the crop is obvious.
Where to put faces and text
Keep the subject in the center third. Avoid important type on the far left and right — those edges vanish on the shelf. Duration and UI still eat corners. Use the safe-zone preview on a Shorts URL the same way you would on a long video.
Auto stills on Shorts
If you never uploaded a custom thumb, YouTube’s four auto frames are often a random beat from the take. They may be 4:3 letterboxed. Upload a 1280×720 custom if you care what the shelf shows. See custom vs auto.
How to design a Shorts thumbnail that survives the crop
- Start from 1280×720, same as long-form.
- Put the face on the vertical center line.
- Use 1–3 huge words, not a sentence on the left edge.
- Preview in the safe-zone tool and the Shorts downloader.
A Short that also appears as a long video on the watch page will show the full 16:9 still there. You are designing one file for two crops.
Download URL for a Shorts thumbnail
https://www.youtube.com/shorts/VIDEO_ID
→ same still as
https://i.ytimg.com/vi/VIDEO_ID/maxresdefault.jpgIf maxres is a placeholder, fall through HQ like any other video. Size chart: YouTube thumbnail sizes.