Hewbo Video Converter will help you fast convert AVI to MP4 with great quality.
Step 1: Download Hewbo Video Converter and install it.
Download links: Hewbo Video Converter for Windows, Hewbo Video Converter for Mac OSX.
Step 2: Add AVI Video file.
Run Hewbo Video Converter, Click "Add File" to add your AVI video file.

Step 3: Choose Profile.
Click Profile drop-down button to choose "MP4" as your output format.

Step 4: Start to convert AVI to MP4.
Click "Convert" button to start the AVI to MP4 conversion.

Step 5: AVI to MP4 conversion completed.
When conversion is done. You can enjoy MP4 videos in your PC and mobile devices now!
Is it pretty simple? try this at AVI to MP4 immediately.