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Edit.mp4 · .mov · .webm · .mkv

Resize a video online

100% localFiles never leave your device — no upload, no account, no tracking.
About Resize Video

Scale a video to a new resolution — shrink a 4K clip to 1080p, fit a video to a target size, or downscale to save space. Set the dimensions with the aspect ratio locked and ffmpeg.wasm re-renders the video in its original format.

Resizing runs entirely in your browser with no upload and no signup, and it works offline. Your video stays on your device.

How it works
  1. 01

    Add your video

    Drop an MP4, MOV, WebM, or MKV file onto the page or pick it from your device.

  2. 02

    Set resolution

    Choose a new resolution or scale, with the aspect ratio locked.

  3. 03

    Resize

    Click Resize to rescale the video locally with ffmpeg.wasm.

  4. 04

    Download

    Save the resized video in its original format.

Features
set resolutionkeeps aspect ratiokeeps format
Frequently asked
How does the Resize Video tool work?
Scale a video to a new resolution — shrink a 4K clip to 1080p, fit a video to a target size, or downscale to save space. Set the dimensions with the aspect ratio locked and ffmpeg.wasm re-renders the video in its original format.
Are my files uploaded to a server?
No. Everything runs entirely in your browser using local JavaScript and WebAssembly. Your files never leave your device.
Does it cost anything or require an account?
No. The tool is free, needs no sign-up, and runs locally in your browser.
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