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Change video aspect ratio
Fit any video into 9:16, 1:1, 4:5 or 16:9 without cutting anything off. Fill the space with a blurred copy of your video or a solid color.
Upload a video to change its aspect ratio
or drop a file here · MP4, MOV, WebM or MKV
Processed on your device. Nothing is uploaded.
Video Aspect Ratio Converter: free, private and right in your browser
Fit any video into 9:16, 1:1, 4:5 or 16:9 without cutting anything off. Fill the space with a blurred copy of your video or a solid color.
- Blurred-video background, like popular creator apps
- Solid color background of your choice
- Or fill the frame by cropping
- Presets for every social platform
- Private: processed on your device
How to use the video aspect ratio converter
REC 00:42Step 01Choose your video
Select the video you want to reformat.
9:16Step 02Pick a ratio and style
Choose 9:16 for Reels and TikTok, then pick a blurred or colored background, or fill by cropping.
MOV → MP4Step 03Render and download
Click "Change aspect ratio" and download the result.
Landscape to vertical
Post a 16:9 video on TikTok, Reels or Shorts without black bars or cropping.
Square posts
Make 1:1 versions for feeds and ads.
Vertical to widescreen
Put a phone video into a 16:9 frame for YouTube.
Frequently asked questions
Is my video uploaded?
No. Everything happens in your browser using your own device. Your video never leaves your computer or phone.
What is the difference between Fit and Fill?
Fit keeps the whole video and fills the empty space with a background. Fill zooms in until the frame is full, cropping the edges.
What resolution is the output?
The long side matches your video's long side, up to 1920 pixels.
Can I pick the background color?
Yes. Choose "Solid color" and pick any color.
Which browsers are supported?
Recent Chrome, Edge, Firefox and Safari (16.4+). The tool uses WebCodecs, your browser's built-in video encoder, and tells you before you start if something isn't supported.
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