Video Aspect Ratio Resizer

How to Change a Video's Aspect Ratio

Upload an MP4, WebM or MOV video up to 60 seconds long. Pick the shape you need (9:16, 16:9, 1:1 or 4:5), then choose how the video should fit into it. The preview shows exactly how the result will be framed, so you can play it, adjust the crop or background, and only convert once it looks right. When the conversion is finished, the file is checked and the Download Video button appears.

What Is a Video Aspect Ratio?

Aspect ratio is the relationship between a video's width and its height. A 16:9 video is 16 units wide for every 9 units tall, whatever its actual pixel size. A 1920x1080 video and a 1280x720 video are both 16:9.

16:9 vs 9:16 Video

16:9 is the landscape shape used for most YouTube videos, TVs and laptop screens. 9:16 is the same shape turned on its side, made for phones held upright. It is the format used by YouTube Shorts, Instagram Reels and TikTok. Square 1:1 and portrait 4:5 videos sit in between and are common in Instagram and Facebook feeds.

Crop vs Fit: What's the Difference?

Crop to Fill makes the video fill the whole new frame, which means some of the picture at the edges is cut off. You can drag the video to choose which part stays in view. Fit Entire Video keeps every part of the original frame and fills the leftover space with a solid colour. Blurred Background also keeps the whole frame, but fills the space with a soft, blurred copy of the same video instead of a flat colour.

Does Changing Aspect Ratio Affect Video Quality?

The video has to be re-encoded, which always involves some compression. The High quality setting uses a higher bitrate to keep more detail. If your original is smaller than the output size, it has to be enlarged, and enlarging can't add detail that wasn't recorded. The tool warns you when that happens.

Are My Videos Uploaded?

No. The video is read, re-framed and encoded inside your browser using your device's own video features. It isn't sent to our servers or to any other service.

Can I convert a 16:9 video to 9:16?

Yes. Choose 9:16 and then Fit Entire Video, Crop to Fill or Blurred Background.

Can I change a portrait video into landscape?

Yes. Choose 16:9. Fit and Blurred Background keep the whole portrait frame in the middle, while Crop to Fill zooms in to fill the width.

Will the tool keep my original audio?

Yes, when your browser can handle the audio. AAC audio is usually copied as it is into MP4 files. If the audio can't be kept, the tool tells you before converting and won't remove it without your permission.

Will changing the aspect ratio reduce video quality?

Re-encoding causes a small loss, and enlarging a small video makes it look softer. Choose High quality and a source at least as large as the output for the best result.

Can I resize a video without cropping it?

Yes. Fit Entire Video and Blurred Background both keep the complete original frame.

Does IntuWebTools upload my video?

No. All processing happens on your device, and the video stays in your browser.

Why does video conversion take longer than image resizing?

A video is made up of thousands of images, plus audio. Every frame has to be redrawn and compressed again, so conversion depends on the length, the resolution and the speed of your device.