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YouTube Shorts aspect ratio: what YouTube actually requires

September 27, 202610 min read
Young creator reframing a horizontal interview into a vertical clip on his laptop, phone standing upright beside the keyboard

The YouTube Shorts aspect ratio to aim for is 9:16, vertical, and it is the right default. It is not what YouTube requires, though: its help pages accept any video that is square or vertical, and none of the pages read for this article gives a pixel size for Shorts.

That gap matters. The rule most creators repeat is stricter than the one YouTube writes, and the one YouTube does write comes with a warning that almost nobody passes on.

TL;DR

  • YouTube categorizes a video as a Short when it is square or vertical, three minutes or less, and uploaded on or after October 15, 2024.
  • 9:16 is the practical default, but a square video qualifies too.
  • A 16:9 video is not a Short. YouTube itself tells you to use a wider ratio when you do not want one.
  • The only resolution YouTube states for Shorts is a ceiling, 1080p. The familiar 1080 x 1920 is arithmetic, not a published spec.
  • Do not bake black bars into your video: YouTube's resolution page asks you not to.

Table of contents

YouTube Shorts aspect ratio, as YouTube writes it

The YouTube Help page Upload YouTube Shorts lists two conditions for the file you pick in YouTube Studio: up to three minutes, and "a square or vertical aspect ratio". Not 9:16. Not a pixel size. A shape.

The page Understand three-minute YouTube Shorts turns that into a rule. On a standard channel, videos uploaded on or after October 15, 2024 "with a square or vertical aspect ratio up to three minutes in length will be categorized as Shorts on YouTube."

The wording goes back to the announcement. On October 3, 2024, Todd Sherman, Director of Product Management for YouTube Shorts, wrote on the official YouTube blog that the three minute change "applies to videos that are square or taller in aspect ratio". Square or taller: that is the entire definition, and the same help page reuses those exact words for Official Artist Channels.

The upload date and the length are the other two conditions. They are covered in how long are YouTube Shorts, so this article stays on the shape.

9:16, square or 16:9: what each shape becomes

Here is what YouTube's pages say for each shape, assuming the video lasts three minutes or less and was uploaded on or after October 15, 2024 on a standard channel.

Shape of the video Categorized as What the YouTube pages say
9:16, vertical Short Named on the resolution page as a vertical format the player adapts to
Square Short "a square or vertical aspect ratio", on the upload page
Any frame taller than it is wide Short "square or taller in aspect ratio", in the announcement and the help page
16:9, horizontal Long form video "use a wider aspect ratio such as 16:9 for long-form videos"

Why 9:16 stays the default anyway. It is the vertical version of the 16:9 frame that cameras and editing tools already offer, so a horizontal workflow turns into a vertical one without inventing odd sizes. The rule allows square; nothing in YouTube's pages says square does better or worse. Choose 9:16 because it is simple, not because a square Short would be refused.

The 16:9 line is the one you control. The three minute page answers the opposite question, which is rarer and more useful: "If you don't want your content to be classified as Shorts, use a wider aspect ratio such as 16:9 for long-form videos." The shape works like a switch. A trailer, a teaser or a short clip you want on the watch page rather than in the Shorts feed stays horizontal. Everything you want in the Shorts feed goes square or taller.

The pixel size YouTube does not publish

Search for this topic and one number comes back everywhere: 1080 x 1920. Here is what YouTube's own pages actually state.

The page Get started creating YouTube Shorts says: "You can upload Short videos with a maximum resolution of 1080p." That is a ceiling, not a target size.

The page Video resolution & aspect ratios does contain a table of pixel sizes, but it opens with "For the default 16:9 aspect ratio". Its 1080p line reads 1920x1080. There is no vertical table on that page.

So 1080 x 1920 is the 1080p horizontal frame turned on its side: 1080 pixels wide, 1920 pixels tall. It is consistent with the 1080p ceiling, and it is a sensible export setting. It is simply not a size YouTube publishes for Shorts on the pages read here, and it is worth knowing the difference when an article presents it as a requirement.

Two practical consequences:

  • Export vertical at 1080 x 1920. It matches the 9:16 shape and stays within the stated ceiling. The pages do not say what happens to a vertical file above 1080p, so staying at 1080p removes the question.
  • Keep the frame rate you recorded. YouTube's page of recommended upload encoding settings lists MP4 as the container and H.264 as the video codec, and asks that content be "encoded and uploaded in the same frame rate it was recorded". That page is not specific to Shorts, but nothing in the Shorts pages read here contradicts it.

Black bars, the shortcut YouTube asks you to skip

The obvious shortcut to make a horizontal video vertical is to drop it into a 9:16 canvas and fill the space above and below with black. The file is then technically vertical. YouTube's resolution page asks you not to do exactly that:

"For best results, avoid adding padding or black bars directly to your video. Padding interferes with YouTube's ability to change the player dynamically to your video size and the viewer's device."

The same page explains that YouTube handles the framing itself where needed. On computer browsers, it may add padding around 9:16 vertical videos, white by default and dark gray when Dark theme is on. That is the player's job, not your file's.

There is also a plain visual cost. A 16:9 picture placed inside a 9:16 frame at full width fills roughly a third of the frame's height. The person you wanted to show becomes a thin strip in the middle of a phone.

To be precise about what the pages do and do not say: nothing in them states that a letterboxed file stops being a Short. The guidance is about how the video displays. That is reason enough to crop instead of pad.

Turning a 16:9 video into a vertical Short

Cropping is the real work, because a 9:16 window taken from a 16:9 frame at full height keeps roughly a third of its width. What sits in that third decides whether the clip works. There are two ways to do it.

With YouTube's own tool. The help page Create YouTube Shorts from your videos describes Edit into a Short: on the watch page of a public video you uploaded, tap Remix, then Edit into a Short. You select up to 60 seconds of the video, and you can tap Layout to choose a different layout. The limits are written on the same page:

  • It only works on your own long form public videos. Private and unlisted videos are excluded, and so are videos with third party copyright claims.
  • You cannot use music or other sounds from the Audio Library on Shorts made this way.
  • If the option does not appear, YouTube points to a setting in YouTube Studio: under Shorts remixing, check the box "Allow people to sample this content".
  • The selection stops at 60 seconds, even though a Short can run up to three minutes. You can record more segments with the Shorts camera, up to 60 seconds in total.

Outside YouTube, with a crop that follows the speaker. For interviews, podcasts and tutorials, a fixed crop in the middle of the frame loses whoever is not in the center. The crop has to follow the person talking.

That is the part viralmaker automates. You paste a YouTube link, yours or someone else's. The tool surfaces the best moments of the video, gives each clip a virality score, then returns the clips cut vertically in 9:16 and cropped on whoever is speaking, with burned in subtitles you can read without sound. There is no watermark on any plan, the analysis and the scores are free, and you do not need a YouTube channel of your own.

If the video is not yours, check the rights before you build a habit on it: use a YouTube video without permission walks through the cases. For choosing which moments to cut in the first place, the full method is in turn a YouTube video into shorts.

Frequently asked questions

What is the best aspect ratio for YouTube Shorts? 9:16, vertical, as a default. YouTube's requirement is broader: square or vertical, three minutes or less, uploaded on or after October 15, 2024 for a standard channel.

Can a square video be a YouTube Short? Yes. The upload page names "a square or vertical aspect ratio", and the three minute page categorizes square videos as Shorts under the same conditions of length and upload date.

Can a horizontal 16:9 video be a Short? No. YouTube tells creators to use a wider aspect ratio such as 16:9 precisely when they do not want a video classified as a Short. To turn a horizontal video into a Short, you have to reframe it.

What resolution should a YouTube Short be? YouTube states a maximum of 1080p for Short uploads. A vertical 1080p frame measures 1080 x 1920, which is the usual export setting, even though YouTube gives no vertical pixel size on the pages cited here.

Why does my vertical video show white or gray bars on a computer? That comes from YouTube's player, not from your file. On computer browsers, YouTube may add padding around 9:16 vertical videos, white by default and dark gray with Dark theme on.

My Shorts are vertical and still get no views. Is it the format? If the shape, the length and the upload date check out, the format is not the problem. The usual causes are elsewhere, and they are listed in why my shorts get no views.

Where to start

One line to keep: YouTube asks for square or taller, 9:16 is the sensible default, and 1080p is a ceiling rather than a spec.

Two things to do this week. Set a 1080 x 1920 vertical export preset in your editor once, so every clip leaves at the right shape and within the 1080p ceiling. Then take the horizontal video you were about to letterbox and decide what stays in the frame instead.

If that video is a long one, paste a YouTube link and look at which moments come out first, each with its virality score, before you crop anything by hand. The analysis is free. To generate your clips, sign up on viralmaker; the plans are on the pricing page.

Sources cited in this article, all read on September 27, 2026: six YouTube help pages on support.google.com, titled Upload YouTube Shorts, Understand three-minute YouTube Shorts, Get started creating YouTube Shorts, Video resolution & aspect ratios, YouTube recommended upload encoding settings and Create YouTube Shorts from your videos, plus the YouTube blog post Tall updates coming to Shorts by Todd Sherman.