Convert MOV, MP4, WebM, and MKV online.
Remux compatible video and audio streams without re-encoding, so the original quality stays intact. No upload, no signup, no watermark.
Your file stays in this browser tab.
Stream copy preserves original quality.
Convert between the most common video container formats.
Need batch conversion or transcoding?
This tool converts one file at a time without re-encoding. Cutsio helps teams search, organize, review, and prepare media for their existing finishing workflow.
Common questions.
How do I convert MOV to MP4 online?
Choose your MOV file, select MP4 as the output container, and start the conversion. This remuxes compatible video and audio streams without re-encoding, so the original quality is preserved.
Is my file uploaded anywhere?
No. The conversion runs entirely in your browser tab. Your file never touches a server.
What does "no re-encode" mean?
The video and audio streams are copied directly into the new container without being decoded and re-encoded. This is fast and preserves the original quality. If a codec is not compatible with the target format, you'll see an error suggesting a compatible format.
What formats are supported?
You can convert between MP4, MOV, WebM, and MKV. The output format must support the codecs used in your source file — for example, WebM only supports VP8, VP9, and AV1 video with Opus or Vorbis audio.
What's the difference between container and codec?
The container (MP4, MOV, etc.) is like a box that holds the video and audio streams. The codec (H.264, AAC, etc.) is how those streams are encoded. This tool changes the box, not the encoding.