Online Video Resizer
Resize video online for uploads, embeds, social posts, or storage. Upload a video to load its original dimensions, then choose a preset or enter smaller custom width and height values.
How to resize a video
- 01Open the online video resizer and upload your video to load its original resolution.
- 02Enter custom width and height values no larger than the original dimensions.
- 03Keep the lock on to preserve the aspect ratio, then click Resize and download.
Resizing features
With the lock on, editing width recalculates height from the source ratio - no stretched or squashed frames.
The original width and height are filled in automatically, and neither field can exceed the source video.
Dimensions snap to even numbers automatically, keeping H.264 output valid on every player.
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Frequently asked questions
How do I resize a video online?+
Open the online video resizer, upload the source video, choose a preset or smaller custom dimensions, keep the aspect ratio locked, then resize and download the reviewed MP4.
What does the lock icon do?+
It ties height to width using the source aspect ratio. Turn it off when you need a different ratio; use the Video Cropper when you want to reposition the framing.
Which output format do I get?+
MP4 with H.264 video and AAC audio - the most compatible combination across players and platforms.
Can I resize a video without losing quality?+
You cannot create detail that is missing from an enlarged video. Start with the original file, resize once to a sensible target, keep the aspect ratio locked, and review the result at its publishing size.
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