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ConvertBox

Compress Video

Reduce video file size

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Select Video File

Support MP4, AVI, MOV, WebM, MKV, etc.

Max file size: 500MB

How to Use

  1. Select the video file to compress
  2. Set the desired quality
  3. Click "Compress Video" button
  4. The compressed video will be downloaded automatically

All processing is done in your browser, and files are never sent to a server.

Frequently Asked Questions

What is CRF?
CRF (Constant Rate Factor) controls video quality. Lower values mean higher quality but larger files. Values between 23-28 are recommended for most uses.
How much can the file size be reduced?
Depending on the CRF setting, you can achieve 30-80% file size reduction.
Will compression affect video resolution?
No, compression reduces file size by adjusting quality parameters, not resolution.