About this tool
Compress videos online: choose an MP4, MOV, WebM or MKV file and re-encode it to MP4 at High, Standard, Smaller or Smallest quality and a resolution such as 1080p, 720p or 480p, optionally without audio or as a single section. The browser’s built-in hardware encoders do the work on your device, so the video is never uploaded.
Typical uses
- A messaging app, email or cloud drive limits video size
- Shrink a 4K phone video to 1080p for sharing
- Compress screen recordings or meeting videos to save space
How to use
Choose a video, then High, Standard, Smaller or Smallest quality and a target resolution. Optionally remove audio or compress only one section.
Click Start compressing and keep the page open. When it finishes, compare sizes, preview the quality and download the MP4.
Uses the browser’s built-in WebCodecs hardware encoding and outputs MP4 (H.264 + AAC when available). Up to 4 GB; results stay in memory, so about 2 GB works best. Speed depends on your device, and low-bitrate originals may not get smaller.
Frequently asked questions
How long does compression take?
It depends on length, resolution and your device. With hardware encoding most computers run at or above real time; keep the page open while it works.
Why is the result not smaller?
If the original bitrate is already low, Standard may not shrink it. Choose Smaller or Smallest, or reduce the resolution.
How large can the video be?
You can choose files up to 4 GB, but results are kept in memory, so videos up to about 2 GB work best. On phones, use shorter clips.