Resize Video Online

Scale down the width of your video to reduce file size or meet platform requirements. Aspect ratio is preserved automatically. Set a max width and the video will be downscaled to fit.

CompressResizeTrimRemove Audio

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Drop your video here

or click to select a file

Up to 5 GB · MP4, MOV, AVI and more

Enter a maximum width and the tool scales your video down to fit, preserving the original aspect ratio. Smaller dimensions mean smaller files — useful when a platform restricts resolution or when you want to reduce size without targeting a specific file size.

How to use

  1. 1.Upload your video using the button above.
  2. 2.Enter a max width in pixels (e.g. 1280 for 720p, 854 for 480p, 640 for 360p).
  3. 3.The preview updates immediately to show the scaled result.
  4. 4.Click Apply to re-encode at the new dimensions.
  5. 5.Download the resized MP4.

What this tool does

The tool uses FFmpeg's scale filter with the constraint that width never exceeds your input. Height is calculated automatically to maintain the original aspect ratio, rounded to the nearest even number (required by H.264). If your video is already narrower than the max width you enter, it is re-encoded at its current size — it is never upscaled.

Features

  • —Set any target width in pixels
  • —Aspect ratio preserved automatically
  • —Video is never upscaled beyond its original size
  • —Live preview shows the scaled dimensions before applying
  • —Output is MP4 (H.264 + AAC)
  • —No account required; files deleted after 1 hour

FAQ

What width should I use for 720p, 1080p, or 480p?
Standard widths for 16:9 video: 1920px for 1080p, 1280px for 720p, 854px for 480p, 640px for 360p. For portrait video (9:16), these are the height values — enter the corresponding width for your aspect ratio.
Will resizing also reduce the file size?
Yes. Fewer pixels means less data per frame, so the output file is smaller. The reduction depends on how much you scale down. For a more aggressive size reduction at the same dimensions, use the Compress tool.
Can I resize to a specific height instead of width?
Not directly — the tool takes a max width and derives the height. If you need a specific height, calculate the corresponding width using your video's aspect ratio.
What happens if I enter a width larger than the original video?
The video is not upscaled. FFmpeg uses a min() constraint so the output width is capped at the original. The video is re-encoded but stays at its current size.
Does resizing affect audio quality?
No. Audio is re-encoded to AAC at a standard bitrate regardless of the resize value. Only the video dimensions change.