Change aspect ratio

Put your video in each network's format.

9:16 for Reels, TikTok and Shorts, 4:5 and 1:1 for the feed, 16:9 for YouTube. Pick, convert and download, no upload.

Other tools

or drag the file here

Your video never leaves your computer: everything runs in the browser.

Posting the same video in several formats and pages? On DevX Viral the page's format goes into every video at once.

Frequently asked questions

What's the difference between fill and fit whole?

Fill takes the whole screen and crops what's left at the edges. Fit whole keeps the entire video and pads it with black bars.

Which aspect ratio for Reels and TikTok?

9:16, vertical, at 1080 x 1920. It fills the whole phone screen.

Does it take long?

Resizing re-encodes the video on your computer. A short video takes seconds; a long one can take a few minutes.