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How to Use
- 1Upload a video file (MP4, WebM, MOV).
- 2Select an output quality preset (High, Medium, Low, or Very Low).
- 3Choose the output format (WebM or MP4, depending on browser support).
- 4Click "Compress Video" and wait — compression takes approximately the same duration as the video.
- 5Download the compressed file when done.
About Video Compressor Online
The Video Compressor re-encodes your video at a lower bitrate using the browser's built-in MediaRecorder API, producing a smaller output file entirely on-device. No files are uploaded to any server.
Choose the quality preset that balances file size and visual quality for your use case. Output format can be WebM or MP4, based on what your current browser supports.
Frequently Asked Questions
How long does compression take?
Approximately the same as the video duration, since re-encoding happens in real time. Keep the browser tab open.
What is the output format?
You can choose WebM or MP4 when supported by your browser. If MP4 is unavailable, the tool will use WebM.
Is my video uploaded to a server?
No. Compression runs entirely in your browser using the MediaRecorder API. Your video never leaves your device.
Which browsers are supported?
Chrome and Edge have the best support (WebM and sometimes MP4). Firefox typically supports WebM output. Safari support can vary by version.