Export at 1080 × 1920
That's full HD vertical — the standard for phones. Higher is fine; lower still uploads but looks soft next to other Shorts.
A 720 × 1280 export from an old template
1080 × 1920 at the frame rate you filmed in
Setting up a channel? Pick a name with the Channel Name Generator, check your thumbnail size, and find video ideas built on real outliers.
Shorts are vertical (9:16) or square videos up to 3 minutes long. Export at 1080 × 1920 and keep text away from the edges, where the Shorts player puts its buttons and captions.
That's full HD vertical — the standard for phones. Higher is fine; lower still uploads but looks soft next to other Shorts.
A 720 × 1280 export from an old template
1080 × 1920 at the frame rate you filmed in
The Shorts player overlays the title and channel at the bottom and the like/comment buttons on the right. On-screen text placed there gets covered.
Captions along the bottom edge
Captions in the upper-middle third
Shorts can now be as long as 3 minutes. Length isn't the goal: a Short that loses viewers in the first seconds won't be shown widely, however long it is.
A 2:40 Short with a slow intro
A 35-second Short that states the payoff in the first line
Rewrites are illustrative examples, not measured results.
1080 × 1920 pixels (9:16 vertical) is the standard. Square videos also count as Shorts. The maximum length is 3 minutes.
Up to 3 minutes. Longer vertical videos are treated as regular videos.
The usual causes are a horizontal aspect ratio or a length over 3 minutes. Drop the file above to check both.
No. Your browser reads the dimensions and length locally; the file never leaves your device.