Hit Start . A blue progress bar at the bottom will track the conversion. Comparison of Top Free Converters

Click Browse to choose your destination and name the file (ensure it ends in .avi ).

A long-standing favorite, the free version supports batch processing and simple device presets, making it easy to convert H.264 files for older AVI-only players. How to Convert H.264 to AVI for Free using VLC

The search for a often leads to a mix of ad-heavy sites and trialware. To get a truly free, unlimited tool, you should look for open-source or reputable freeware that doesn't hide "Pro" features behind a paywall. Top 3 Free H.264 to AVI Converters (Full Versions)

This is a professional-grade free tool designed by editors. It uses the powerful FFmpeg engine but provides a user-friendly interface. It handles almost every codec, including H.264, and exports to AVI with high precision.

VLC is more than a player; it has a built-in transcoder. It is 100% open-source and allows for complete H.264 to AVI conversion without any extra downloads.

Click Add to select your H.264 video and then click Convert / Save at the bottom.