Free Video Compressor Online
Reduce video file size by re-encoding at a lower bitrate in your browser using MediaRecorder API. Choose from preset quality levels. No upload — 100% private and free.
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MP4, WebM, MOV · Chrome/Edge recommended
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About the Video Compressor
This tool re-encodes your video at a lower target bitrate using the browser's MediaRecorder API. The video plays back in real time and the output stream is captured at the specified bitrate. Lower bitrate = smaller file but lower quality. The output is WebM format, which is supported by all modern browsers, media players and video editors.
Frequently Asked Questions
Results depend on the original video's bitrate. At 1.5 Mbps, a typical 1080p MP4 (originally 8–15 Mbps) will see 5–10× size reduction. At 500 Kbps you can compress 1080p to under 4 MB per minute at the cost of some quality.
MediaRecorder captures the video stream in real time — it has to play through the entire video to re-encode it. This is a limitation of the browser API. A 2-minute video takes approximately 2 minutes to process.