Resize a video for any screen

Every shape at every size

The size you pick is the short side, so 1080p means 1080 pixels on the short side whatever the shape. Exporting never adds detail a video does not have: a 720p clip exported at 4K is only a bigger file. The aspect ratio calculator works out any other size.

To change the resolution of many videos without touching their shape, use Convert video in Converters instead. Drop the files, open More settings and set Size to anything from 4K down to 240p. Each video is scaled on its short side, keeps its shape, and is never made bigger than it is.

TikTok

TikTok is built around full-screen vertical video in 9:16, and 1080 × 1920 is the size it suggests. Choose Vertical and export at 1080p.

A landscape clip has two ways in. With Fill, cut edges it covers the whole screen, keeping about a third of its width; slide it with Left and right so the person or the action stays in view. With Fit, with bars it sits in the middle, whole, with bars above and below. Those bars are useful space: put a title in the top one with the Text tab and a caption in the bottom one.

Export at Balanced or Best. Platforms compress what you upload once more, so a clean file to start from pays off.

Instagram Reels and posts

Reels are vertical, like TikTok: Vertical at 1080p gives 1080 × 1920, and one export can go to both.

Posts in the feed can be square or portrait. Portrait (4:5, 1080 × 1350) is taller than a square, so it fills more of the screen as people scroll. Square (1:1, 1080 × 1080) is the classic grid shape. A landscape clip in a square post keeps its whole picture with bars above and below under Fit; under Fill it loses its sides instead.

Choose the bar color with nothing selected, under Background. White or a brand color often looks more deliberate in a feed than black bars do. When one video goes to both the feed and Reels, export it twice: once as Portrait, once as Vertical.

YouTube Shorts

Shorts are vertical too, so the Vertical export made for TikTok and Reels works here as well. Make one 1080 × 1920 video and post it to all three. One file for three apps also means one place to fix a mistake: change the project and export again.

Each of these apps lays its own buttons, names and captions over the video, mostly along the bottom and the right side. Keep titles and important action toward the middle and upper part of the frame, and play your export on a phone before posting to check nothing important is covered.

Cutting a Short from a longer landscape video? Trim it to the strongest moment first, then reframe it with Fill and slide, and add captions for people watching without sound.

YouTube

Regular YouTube videos are landscape, 16:9. Landscape at 1080p (1920 × 1080) is the usual choice; pick 4K (3840 × 2160) when your footage was filmed in 4K and you want viewers to have that detail.

Vertical phone clips in a landscape video show with bars at their sides. Pick a Background color for those bars, or let a clip fill the width with Fill, cut edges, which cuts off its top and bottom. Clips of different shapes can sit in one video, each framed its own way, so a phone clip and a camera clip can follow each other.

The 16:9 frame also makes a ready-sized thumbnail: save a frame of the video and it comes out at 1920 × 1080.