Best free mkv to mp4 converter that works on windows 11?

Avidemux is a lightweight, efficient, free and open-source tool that excels at convert mkv to mp4 it enables lossless pure container format conversion with no re-encoding, ultra-fast processing and minimal operations, making it an ideal choice for simple format switching needs.

How to Convert MKV to MP4

1. Open your target MKV file in Avidemux
2. Set Output Format to MP4 Muxer
3. Select Copy for both Video and Audio tracks
4. Click File → Save to start conversion

Conversion time for 1GB MKV file: only 10-20 seconds

Advantages

• Ultra-lightweight design, installation package under 15MB, minimal system resource consumption, smooth conversion without lag
• Directly copies audio and video tracks, 100% preserves original picture and sound quality, lossless format conversion
• Simple operation: conversion completed in just a few steps, making it beginner-friendly

Disadvantages

• Only supports pure container format switching; conversion fails if MKV's internal encoding is incompatible with MP4
• Limited format compatibility with no additional encoding adjustment options; does not support complex transcoding requirements
• Functionality remains basic, lacking advanced features such as batch conversion or resolution adjustment

Avidemux excels at performing pure container format conversions such as converting MKV to MP4 with remarkable efficiency, thanks to its core strengths of no re-encoding, lightning-fast processing, and lossless image quality. This lightweight and user-friendly software preserves the original picture quality throughout the conversion process, making it ideal for straightforward format switching requirements. However, it currently lacks support for complex transcoding and batch conversion operations.