Most people already have the VLC Media Player installed. It includes a built-in conversion feature that is excellent for one-off tasks.
MKV (Matroska) and MP4 (MPEG-4 Part 14) are both , not codecs. Think of them as "buckets" that hold video, audio, and subtitle streams. mkv to mp4
MP4 is the standard for streaming platforms like YouTube and Vimeo. Most people already have the VLC Media Player installed
MP4 is supported by almost every device, including smartphones, smart TVs, and game consoles like PlayStation and Xbox. mkv to mp4
Professional software like Adobe Premiere and iMovie often prefer MP4 over MKV.