Video aspect ratio converter: 16:9, 9:16, 1:1, 4:5
Switch between 16:9, 9:16, 1:1 and 4:5 with a blurred fill or crop.
Processed on your deviceHow to change a video's aspect ratio
- 1
Upload your video.
- 2
Pick the new shape (9:16, 16:9, 1:1, 4:5 or 4:3) and how to fill it: blurred background, crop or colored bars.
- 3
Click Convert and download the MP4.
Frequently asked questions
Which option should I use for TikTok and Reels?
9:16 with blur fill keeps your whole horizontal video visible and fills the top and bottom with a blurred copy, so nothing is cut off. Choose crop if the action is in the middle and you want it full screen.
Is the video uploaded?
No. Conversion uses ffmpeg compiled for the web and runs entirely on your device, so long videos can take a while on slower phones.
Is the sound kept?
Yes, the audio track is kept and re-encoded as AAC.
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