TikTok video size and aspect ratio

Search for the TikTok video size or the TikTok aspect ratio and the answer arrives before you click anything: 1080 × 1920, at 9:16. Then the same page starts to disagree with itself about the file size — 72 MB, 287.6 MB, 500 MB, 4 GB, 30 GB — sometimes inside a single answer.

Read on September 13, 2026, no page TikTok publishes for ordinary posts gives a pixel size, and none names 9:16 as a requirement. What TikTok does publish for posting on the web is a shape class and three limits: landscape or vertical, up to 60 minutes, up to 4K, up to 30 GB.

And the file sizes are not really contradicting each other. Most of them are TikTok’s own numbers — for three different doors into TikTok.

What TikTok actually publishes about a video

All three are TikTok Creator Academy articles, read September 13, 2026, and all three carry a “Last updated” date in August 2026. None gives a width, a height, or a ratio beyond the words “landscape” and “vertical”.

TikTok’s Help Center article Making a post, read the same day, walks through posting from the app step by step. Its one nod to limits is to “Select a maximum length for your video.” It gives no dimensions, no aspect ratio, and no file size for an upload from a phone.

Where the conflicting file sizes come from

Line the numbers up against TikTok’s own documentation and most of them find a home. They are not rival claims about one upload; they are limits on different ways of getting a video in.

30 GB is TikTok Studio on the web. That is the Creator Academy figure above, together with 60 minutes and “1080p, 2k, and 4k”. It is the most generous path TikTok documents.

4 GB is the Content Posting API. TikTok for Developers’ Media Transfer Guide (last updated August 4, 2026) lists a video maximum of 4GB for apps that post to TikTok on your behalf — scheduling tools, editors with a “share to TikTok” button. The same page is the only TikTok page we found with pixel limits at all, and they are a range rather than a size: a minimum of 360 pixels and a maximum of 4096 pixels on each edge.

500 MB is advertising. TikTok Ads Manager’s TikTok Auction In-Feed Ads page (last updated June 2026) caps a non-Spark ad video at “Less than or equal to 500 MB”. That is a limit on ad creative uploaded to Ads Manager, not on a post from your account.

72 MB and 287.6 MB have no TikTok source we could find. They circulate as the Android and iOS app limits. Neither appears on any TikTok Help Center, Creator Academy, developer or ads page we read. TikTok does not publish an in-app upload size, so any figure quoted for it is somebody else’s measurement, of some app version, at some point in time.

The only place 9:16 appears is in the ads specs

Just as with YouTube, the ratio everyone quotes is in TikTok’s documentation — on the advertising side. The same Ads Manager page lists, for non-Spark ads:

• Vertical, marked recommended: 9:16, at least 540 × 960 px
• Horizontal: 16:9, at least 960 × 540 px
• Square: 1:1, at least 640 × 640 px

Read what that is. It is a recommendation, for ads, and even there the published pixel figure is a minimum of 540 × 960 — half of 1080 × 1920 in each direction. TikTok’s own ad specs accept three shapes and prefer one.

Is TikTok 1920 × 1080?

Only if you are shooting landscape, and TikTok says plainly that you can. 1920 × 1080 is a 16:9 landscape frame, and the Studio Web article names landscape and vertical side by side.

What changes is how the video is watched. TikTok’s Shooting in landscape on TikTok article says a Full screen button is displayed “for horizontal videos (where the width is larger than the height)”, and tapping it opens Full screen mode. But it sets a condition: true landscape, with no text in the margins. A 16:9 clip you have letterboxed inside a vertical canvas, with a caption in the black space above it, is no longer wider than it is tall. By TikTok’s own definition it is a vertical video with a small picture in the middle.

What about 3:4, 4:5 and 1:1?

TikTok publishes nothing about them for ordinary posts. “Landscape or vertical” covers 3:4 and 4:5 as vertical and says nothing on how a player shows a frame that is vertical but not as tall as a phone screen. The ads page lists 1:1 as an accepted ad shape; for posts, TikTok is silent.

So the honest answer to “tiktok aspect ratio 3:4” is that the shape is allowed by the only rule TikTok states, and that anything more specific you read about how it is displayed was not written by TikTok.

Is 1080p or 4K better for TikTok?

TikTok’s web documentation accepts both: “1080p, 2k, and 4k”. What TikTok then encodes for playback, at what bitrate, on which device, it does not publish. Advice that 4K “looks worse” or “looks better” on TikTok is an observation someone made, not a TikTok statement, and it is worth testing on your own account before you rebuild an export preset around it.

What is certain is the cost on your side: a 4K file is far larger than a 1080p one of the same length, and the phone path has no published size limit to check it against. If an upload from the app fails, the file’s size is the one variable you fully control.

So what should you export?

A vertical video: 1080 × 1920, a 9:16 frame. Not because TikTok requires it — no TikTok page says so — but because it fills a phone screen, it is the shape TikTok’s own ads team recommends, and it is comfortably inside every limit TikTok does publish.

16:9, true landscape, if the video is wide. Keep the margins empty of text, so the Full screen condition can apply. Do not paste it onto a vertical canvas unless you want a vertical video.

Stay under the limit of the door you are using. 30 GB and 60 minutes on Studio Web, 4 GB through a scheduling app, 500 MB for ad creative.

Never stretch a picture to make it taller. A 4:5 frame already counts as vertical under the only shape rule TikTok states. Squeezing faces to reach a ratio TikTok never wrote down is worse than posting the frame as it is.

Tools for reshaping a clip for TikTok

Change the shape, and decide what it costs. A wide clip turned tall loses more than two thirds of its width, or gains bars. The video aspect ratio changer has 9:16 as a preset and takes two numbers of your own for 3:4 or anything else, then lets you crop to fill, pad with a color, or pad with a blurred copy of the video — and it shows the result before it renders. It never enlarges on its own: a 1920 × 1080 clip cropped to 9:16 becomes 608 × 1080 unless you type a larger frame width yourself. The file stays in your browser.

Choose which part survives, or clear the margins. When the speaker stands to one side, a crop taken from the middle keeps an empty wall. Crop video lets you draw the rectangle yourself, which is also how you cut captions and bars off a letterboxed landscape clip so it is true landscape again. The size it reports is measured from the output file.

Fit a length. Posting from the app starts with choosing a maximum length, and a scheduling tool may allow less than Studio Web does. The video trimmer takes a start and an end down to the frame, and the length on its receipt is read from the MP4 it produced.

Fit a byte ceiling. When the limit is a number of megabytes, video compressor aims at the ceiling you enter — 500 MB is one of its presets — and measures the finished MP4 against it rather than hoping.

Checklist

1. Landscape or vertical. That is the shape rule TikTok actually publishes for posting on the web.
2. 9:16 by choice for vertical video. No TikTok page requires it; the ads page recommends it.
3. True landscape for wide video, with no text in the margins, if you want the Full screen button.
4. Up to 60 minutes, up to 4K and 30 GB through TikTok Studio on the web.
5. 4 GB through apps that post for you; 500 MB for ad creative.
6. No published limit for the phone app. Treat 72 MB and 287.6 MB as hearsay.

Sources

• TikTok Creator Academy, Reaching your content goals with TikTok Studio Web — landscape or vertical, “up to 60 minutes long in 1080p, 2k, and 4k resolution”, “up to a size of 30GB”. No pixel dimensions or aspect ratio stated. Last updated August 18, 2026; read September 13, 2026.
• TikTok Creator Academy, Repurposing longer content easily with Smart Split — “30GB max and 60 mins max” for files uploaded to Smart Split on TikTok Studio Web. Last updated August 18, 2026; read September 13, 2026.
• TikTok Creator Academy, Shooting in landscape on TikTok — Full screen mode requires that “The video is true landscape (or horizontal); it has no text in the margins.” Last updated August 18, 2026; read September 13, 2026.
• TikTok Creator Academy, Unleashing creative potential by using longer video tools — up to 60 minutes when uploading or recording. Last updated August 19, 2026; read September 13, 2026.
• TikTok Help Center, Making a post — “Select a maximum length for your video.” The page names no dimensions, no ratio and no upload size. Read September 13, 2026.
• TikTok for Developers, Content Posting API: Media Transfer Guide — video maximum of 4GB, a minimum of 360 and maximum of 4096 pixels on each edge, 23 to 60 FPS. Applies to apps posting through the API. Last updated August 4, 2026; read September 13, 2026.
• TikTok Ads Manager Help, TikTok Auction In-Feed Ads — non-Spark ads: vertical 9:16 recommended at 540 × 960 px or more, horizontal 16:9, square 1:1, “Less than or equal to 500 MB”. Advertising creative, not organic posts. Last updated June 2026; read September 13, 2026.