Convert MKV to MP4 without re-encoding

Change the container from MKV to MP4 without touching the video — no re-encoding, no quality loss, and it is fast. You can convert MKV to MP4 online here without an upload: this MKV converter runs entirely in your browser, so large files are processed on your device and never sent to a server.

This tool runs entirely in your browser, so it needs JavaScript enabled. The description above stays readable either way — nothing here was ever going to be processed on a server.