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About

Compress video in your browser

Reduce the size of an MP4, WebM, MOV or MKV file directly on your device. Whether you need to fit a video into an email attachment limit, save space on your phone, or prepare a clip for faster uploading to social media, this tool shrinks the file size efficiently. Your files never leave your device. There is no upload, no cloud processing, and no risk to your privacy.

How to use Compress Video

  1. Choose a video file from your device.
  2. Pick a quality level. High gives the best picture, Medium is balanced, and Low yields the smallest file.
  3. Press the action button and wait for processing to finish in your browser.
  4. Review the original and new file sizes to see the space saved.
  5. Download the compressed result directly to your device.
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Frequently Asked Questions

Is my video uploaded to a server?
No. All processing happens entirely within your web browser using your own device's processing power. Your files are never uploaded to any server. You can confirm this by opening your browser developer tools and watching the network tab while the tool runs. No media data ever leaves your machine.
Why is the output an MP4?
MP4 with H.264 video is the most universally supported video format in existence. By outputting to MP4, we ensure that your compressed video will play seamlessly on any smartphone, desktop, messaging app, or social media platform without compatibility issues.
How much smaller will my file be?
The amount of compression depends heavily on the source material. A video that was already heavily compressed at a low bitrate will not shrink much. However, high-quality footage straight from a phone or camera often shrinks substantially, sometimes by 50% or more, while still looking perfectly acceptable for web use.
Does compressing a video reduce its visual quality?
Yes, compression involves discarding some visual data to reduce file size. The 'Low' setting will result in noticeable artifacts, especially in scenes with high motion. The 'High' setting preserves as much quality as possible while still optimizing the file structure.
Accepted formats: MP4, WEBM, MOV, MKV