How to Change Aspect Ratio in CapCut on PC (16:9, 9:16, 1:1)

Canvas ratio vs clip size: what actually changes

Two different things are easy to mix up:

• The canvas (project) ratio is the shape of the finished video, for example 16:9 widescreen, 9:16 vertical or 1:1 square. It applies to the whole project and decides the shape of the exported file.
• The clip framing is how big each clip is and where it sits inside that canvas. A 16:9 clip placed on a 9:16 canvas leaves large empty areas above and below it until you scale it up or add a background.

So the workflow is always the same: set the canvas ratio first, then fix the framing of each clip. If you skip the second part, you get a small widescreen strip floating in the middle of a tall frame.

Before you start

Changing the ratio is a light operation, but reframing and previewing a vertical or 4K timeline is smoother on a PC that meets CapCut's requirements. The official Microsoft Store listing for CapCut (checked 21 October 2026) lists a minimum of Windows 10 or later on an x64 or Arm64 PC, 8 GB of RAM, an Intel Core 6th generation or AMD Ryzen 1000 series processor or newer, DirectX 9 and 2 GB of video memory with a graphics driver dated 2018 or newer. The recommended setup is 16 GB of RAM, an Intel Core 8th generation or AMD Ryzen 3000 series processor or newer, DirectX 12 (feature level 12) and 6 GB of video memory. Our CapCut system requirements for PC page explains how to check each item on your own machine.

Install CapCut only from the official site or the official store listing; the download buttons on this page go to capcut.com. Then open the project you want to change and save it, so you can return to the original if you change your mind. If you plan to keep both versions, duplicate the project from the CapCut home screen first and work on the copy.

How to change the project aspect ratio

In current versions of the desktop app the ratio control sits with the player (the preview window). Labels move between versions, so hover over the controls if you do not see the exact words below.

1. Open your project and make sure nothing on the timeline is selected, so the panels show project settings rather than clip settings.
2. Find the ratio control under or beside the player. It usually shows the current setting, such as Original or 16:9. In some versions you can also change it from the project details or settings panel on the right.
3. Pick the new ratio, for example 9:16 for vertical, 1:1 for square or 16:9 for widescreen. The preview changes shape straight away.
4. Play the timeline from the start to see which clips now need reframing.

If you choose Original, CapCut follows the shape of the first clip on the main track. That is convenient when all your footage has the same shape, but it is better to pick a fixed ratio when you mix phone and camera footage.

Reframe each clip so the subject stays in shot

Once the canvas has changed, go through the clips one by one:

1. Select the clip on the timeline. The settings panel on the right shows its video properties.
2. Scale it up with the scale slider, or drag the corner handles in the player, until it fills the frame. For a widescreen clip on a vertical canvas, scaling up crops the left and right sides.
3. Move it by dragging inside the player, or with the position values, so the important part (usually a face or a product) sits in the centre of the new frame.
4. Crop if needed. The crop tool in the toolbar above the timeline lets you trim the edges of a single clip when scaling alone does not give a clean frame.

If the subject moves across the shot, one fixed position will not keep it in frame for the whole clip. Split the clip where the subject moves (Ctrl + B splits at the playhead, see our guide to splitting and trimming in CapCut desktop) and reposition each part, or animate the position with keyframes as shown in how to use keyframes in CapCut on PC. The Microsoft Store description groups keyframe animation with advanced tools it marks as Pro-only, so on a free plan splitting and repositioning is the safer route.

Some versions also include an automatic reframe option that tracks the subject for you. Where it appears it can save time on long clips, but it may be marked as a paid feature, so check the label before you rely on it.

Fill empty space with a background instead of black bars

Sometimes you do not want to crop, for example when a widescreen shot has important detail at both sides. You can keep the whole clip visible and fill the rest of the canvas instead.

• Blur: fills the empty area with a blurred, enlarged copy of the same clip. This is the most common look for widescreen footage in a vertical video.
• Colour: a solid colour, useful for brand colours or a clean, simple layout.
• Image: a picture or pattern of your choice behind the clip.

Look for a Background or Canvas option in the clip's video settings. Many versions offer a button to apply the same background to every clip, which saves a lot of clicking on long projects.

Which aspect ratio to use for each platform

• 16:9 (widescreen): YouTube's help centre describes 16:9 as the standard aspect ratio for YouTube on a computer, so use it for regular videos, tutorials and anything watched on a TV or monitor.
• 9:16 (vertical): the full-screen phone format used by vertical feeds such as YouTube Shorts, TikTok and Instagram Reels. YouTube says videos with a square or vertical aspect ratio up to three minutes long are categorised as Shorts.
• 1:1 (square): works in feeds that show square posts and on both phones and desktops. Square videos up to three minutes uploaded to YouTube are also treated as Shorts.
• 4:5 and other ratios: some feeds favour slightly taller posts. Check the platform's own help pages for its current recommendation, because these change.

If you publish the same video in several places, edit a master version first, then duplicate the project and change the ratio for each copy. For YouTube-specific numbers, see our CapCut export settings for YouTube.

Export settings that match the new ratio

The export window follows the canvas ratio, so you only choose the resolution. At 1080p a 16:9 project exports at 1920 x 1080, a 9:16 project at 1080 x 1920 and a 1:1 project at 1080 x 1080. Keep the frame rate the same as your footage; YouTube's upload guidance asks for content to be encoded at the frame rate it was recorded.

Do not export above the resolution your footage was filmed at: a clip that you scaled up a lot to fill a vertical frame is already being enlarged, and a higher export resolution will not add detail. Our 1080p and 4K export guide covers bitrate and codec choices.

Common problems after changing the ratio

• Black bars remain. A clip was not scaled to fill the frame and has no background. Select it and scale it up or apply a background.
• Heads or text cut off. Scaling crops the sides. Reposition the clip, or keep it smaller and use a blurred background.
• Titles in the wrong place. Text keeps its position relative to the old canvas. Move titles and captions away from the very top and bottom edges, where phone apps place their own buttons.
• The video looks soft. Heavy scaling enlarges the image. Use a smaller scale with a background, or film in a higher resolution next time.
• A template ignores your ratio. Templates are built for a set shape; see using CapCut templates on PC.

Sources we checked

We checked these official pages on 21 October 2026. CapCut changes its menus and plans often, so if a label on your screen differs from this guide, the tooltips and the in-app shortcut list in your version are the final word.

• Microsoft Store: CapCut listing and system requirements
• YouTube Help: Understand three-minute YouTube Shorts
• YouTube Help: Recommended upload encoding settings
• CapCut Terms of Service

CapCut's own help pages could not be opened from our test location on that date, so where CapCut publishes no specifics we describe the feature in general terms rather than guess.