The best avi to mp4 converter that works well in Windows 11?

One of the best things about Avidemux is that you can often use it as a lightning-fast avi to mp4 converter . Instead of re-encoding the whole video (which takes forever), it can just "copy" the video and audio streams and put them into a new MP4 container. This process is practically lossless and takes only a few minutes, even for huge files, which is awesome if your AVI files are already in a format that MP4 supports, like H.264 or Xvid.

It's pretty easy for a one-off file:

Steps 1: Download and Install: Grab the latest version from the official site.

Steps 2: Open Your File: Drag and drop your AVI into the Avidemux window.

Steps 3: Set the Outputs: On the left side, you'll see dropdown menus. Set Video Output to Copy, Audio Output to AAC (or Copy if it's already compatible), and Output Format to MP4 Muxer .

Steps 4: Save: Just go to File > Save and pick a name for your new MP4. That's it! .

Avidemux is a solid choice if you want a free and pretty straightforward avi to mp4 converter for Windows. It's not as flashy as some paid software, but it gets the job done quickly, especially if you just want to repackage your video without spending ages re-encoding it.

But if you need to convert hundreds of files or want a more polished, beginner-friendly experience, you might want to look elsewhere.