Video Converter
Convert between MP4, WEBM, MOV, MKV and AVI.
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About Video Converter
Video Converter changes a video from one format to another — MP4, WEBM, MOV, MKV or AVI — right in your browser. Upload a file, choose the format you need, and download the converted video. No sign-up, no watermark, and nothing is uploaded.
It runs an in-browser build of ffmpeg and re-encodes to the codec each format expects (H.264 for MP4, MOV and MKV, VP9 for WEBM, MPEG-4 for AVI), so the result plays in the right apps and on the right devices.
Frequently asked questions
- Is it free to use?
- Yes — completely free, with no sign-up, no watermark and no limits.
- Is my file uploaded anywhere?
- No. It runs an in-browser build of ffmpeg, so your video is processed on your own device and never leaves it.
- Which formats can I convert between?
- It reads common video files (MP4, MOV, WEBM, MKV, AVI and more) and can output MP4, WEBM, MOV, MKV or AVI.
- Why does the first run take a moment?
- The first time, it downloads a ~32 MB processing engine, which is cached afterwards so later conversions start instantly.
- Does converting change the quality?
- Converting re-encodes the video, which is lossy, but the settings are chosen to keep quality high. Converting to MP4 (H.264) is the safest choice for playing on most devices.