MKV to AVI Converter — Free, Fast, No Upload

MKV is a modern container format that supports virtually any codec, multiple audio tracks, subtitle streams, and chapter markers. It is the format of choice for personal media libraries and content stored on Plex or Jellyfin servers. However, certain hardware players, older smart TVs, in-car entertainment systems, and DVD authoring tools do not support MKV playback. If your media player or device displays a format error when trying to play an MKV, converting to AVI often resolves the issue on legacy hardware.

AVI has broad hardware support precisely because it is old. Media players built into televisions from the mid-2000s through the early 2010s, external USB media players, and some older Sony and Samsung TV firmware versions play AVI with DivX or Xvid encoding reliably. Windows Movie Maker, older versions of Vegas Pro, and legacy DVD authoring tools like DVD Flick also accept AVI as a primary input format. For workflows that involve older Windows-based video editing software, AVI remains the path of least resistance.

Converting MKV to AVI requires re-encoding the video, since AVI does not support all the codecs that MKV can contain. The converter writes Xvid-style MPEG-4 video at a fixed high quality level and 192 kbps MP3 sound, so the quality loss relative to the original MKV is small, but the file is usually larger. However, features like multiple audio tracks, subtitles, and chapter markers cannot be preserved in the AVI container and will be stripped during conversion. Only the primary video and audio track will carry over to the output file.

Typical sizes (1 minute 1080p): MKV 200–800 MB → AVI 200–600 MB.