Resize Video for YouTube Shorts (9:16 1080x1920, 60s)

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Resizing for YouTube Shorts in detail

YouTube Shorts safe zones are less aggressive than TikTok or Reels. The top 150 pixels are covered by the top bar and search hint, and the bottom 380 pixels sit under the channel avatar, title card, like and dislike buttons, Subscribe CTA, and comment icon. Centered content authored between those bands reaches every viewer without occlusion. YouTube also pulls a thumbnail frame from the middle of the video, so opening on a strong visual in the first 3 seconds is worth more than many small post-production tweaks.

The encoder outputs H.264 MP4 with AAC, which is what YouTube's ingest pipeline transcodes most reliably. The whole resize runs in the browser, so unreleased product demos and internal training clips never leave your machine.

YouTube Shorts requirements

Setting	Value	Notes
Aspect ratio	9:16 or taller	Squarer uploads become regular feed videos.
Recommended resolution	1080 x 1920	Full HD vertical; 720p also supported.
Maximum duration	60 seconds	Clips longer than 60 seconds are removed from the Shorts shelf.
Minimum duration	None	But under 3 seconds rarely performs.
Top safe zone	150 pixels	Top bar and search chip.
Bottom safe zone	380 pixels	Channel avatar, title, like, dislike, Subscribe, comment.
Codec	H.264 MP4 with AAC	YouTube ingests many codecs but H.264 is safest.
Shorts hashtag	#shorts (optional)	Used to help historical classification.

When to use this preset

Cutting longform into Shorts

Trim a 10 minute YouTube video down to a 45 second highlight, resize to 9:16, and upload as a standalone Short that links back to the full video.

Channel teasers

Resize a 16:9 trailer to 9:16 with branded bars top and bottom, then publish as a Short to drive discovery.

Educational one-liners

Letterbox a whiteboard recording so the diagram stays visible, author text in the safe middle band for mobile viewers.

Behind the scenes clips

Crop a handheld phone recording to 9:16 for a raw behind-the-scenes Short that fills the viewport.

Music and reaction Shorts

Resize 16:9 music-video footage to 9:16 letterboxed, so the original composition is preserved above and below the main action.

Frequently asked questions

What is the YouTube Shorts size?

YouTube Shorts run at 1080 pixels wide by 1920 pixels tall in a 9:16 aspect ratio. YouTube accepts any vertical aspect ratio taller than square, but 9:16 at 1080x1920 is the reference spec and fills the viewer without letterboxing.

How long can a YouTube Short be?

YouTube Shorts are capped at 60 seconds. Uploads longer than 60 seconds are published as regular YouTube videos and do not appear in the Shorts shelf. If your clip runs long, trim it before resizing or consider splitting into multiple Shorts.

Why is my Short showing as a regular video?

Either the duration exceeds 60 seconds or the aspect ratio is 1:1 or landscape. YouTube classifies a video as a Short only when both conditions are met. Resize to 9:16 and trim to under 60 seconds, then the classification happens automatically. The #shorts hashtag in the title helps historical categorization but is not required for new uploads.

What aspect ratio for YouTube Shorts?

9:16 vertical is the native format. Taller ratios like 4:5 or 3:4 are also accepted as Shorts, but 9:16 fills the full viewer on mobile without margins. Anything at 1:1 or wider than that is treated as a regular feed video regardless of duration.

Do YouTube Shorts need to be vertical?

Effectively yes. A horizontal 16:9 upload under 60 seconds goes into the regular feed, not the Shorts shelf. For the Shorts shelf and Shorts-specific algorithmic distribution, the video must be taller than it is wide. 9:16 is the clean target.

Can I add a horizontal video to Shorts as letterbox?

Yes. Letterbox the 16:9 source into a 1080x1920 9:16 frame with black bars above and below. YouTube treats the final file as a vertical video because its overall aspect ratio is 9:16, so it qualifies for the Shorts shelf. The visible content area is smaller but the engagement profile is the Shorts one.

What codec does YouTube Shorts use?

YouTube accepts many codecs at ingest, but the safest is H.264 video and AAC audio in an MP4 container. That is what this tool outputs. YouTube re-encodes to VP9 and AV1 behind the scenes for playback, but starting with clean H.264 avoids any ingest errors.

100% Private: Your Video Never Leaves Your Device

Resizing runs locally in your browser using FFmpeg compiled to WebAssembly. Your video file is read from disk into browser memory, processed there, and the result is saved back to your device. No network request is made during encoding, no data is transmitted, and no server ever sees your footage.

Resize Video for YouTube Shorts