A video resizer changes the frame to match a different screen or platform like TikTok or YouTube by adjusting the aspect ratio.
By clicking the download button, you're downloading a free version of the program.*
Resize Video Online for Free
How to use our online video resizer
A free browser-based video resizer can resize video online in the current tab, without desktop software downloads or system checks. A video aspect ratio changer works with MP4 and other common formats and lets users change the aspect ratio before exporting the updated file.
Follow these simple steps:
Step 1. Upload your video
Click Add file and choose the file from the device. The upload starts right after the selection.
Step 2. Pick the perfect size
The video aspect ratio changer includes common presets. A clip can be changed from 16:9 (perfect for YouTube) to 9:16 (ideal for Reels and TikTok) or 1:1 (IG feed), depending on the format needed. A preview is available before export.
Step 3. Export and enjoy
Happy with the new aspect ratio? Export the result. The finished file can be downloaded for free and saved without watermark.
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Frequently asked questions
To resize video online for free, upload the MP4 file, choose the new size or preset, and save the updated version.
You can use the online video resizer for basic tasks. After export, the finished file can be downloaded and used right away. It’s saved without watermark, so the resized version is ready for posting, sharing, or adding to a presentation.
Instagram uses more than one format. 1:1 is used for classic square posts, while 9:16 is perfect for Stories and Reels.
Mobile browsers on iPhone and Android have the same options. Select the files, choose either a 16:9 or 9:16 aspect ratio, wait for the process to complete. Then save the finished video to your gallery.
Files you sent to change video dimensions go through a secure connection and are removed from the servers after 24 hours. That limits how long each file remains stored after processing.
Yes, Movavi Online Video Editor can be used on iPhone and Android smartphones, completely free of charge.
Yes, Movavi Online Video Editor is a completely free video editing tool.
No, you can export your files without a watermark completely free of charge.
*The free version of Movavi Video Editor may have the following restrictions depending on the build: watermark on exported clips, 60-second video or 1/2 audio length limit, and/or some advanced features unavailable when exporting videos.
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