Audio Video Interleaved is known by its initials AVI. AVI is a multimedia container format introduced by Microsoft in the 90s. For today, it is a waste of space and some video players cannot support it. On the other hand, as we all know, MP4 is more useful and popular than AVI. Also, it is supported by most of devices and players. It is the perfect format for playing movies on your desktop or laptop and for publishing online. That's exactly one of the reasons why people would like to choose MP4 as their first option when downloading videos. Comparing to AVI, MP4 has much more advantages. So, if you would like to know how to convert AVI to MP4 in free and simple ways, just keep reading.

Convert AVI to MP4 with VideoSolo Free Video Converter

VideoSolo Free Video Converter is a totally free video conversion software, which can convert any video/audio files easily and fast. With the help of this program, you can convert videos to MP4, MOV, AVI, MKV, FLV and more videos formats or extract audio to MP3, AAC, MP2, AC3, M4B, AIFF, FLAC, OGG, etc. from video files. It also enables you to convert video for playback on iPod, iPhone, Samsung, Apple TV, Sharp, HTC, Google, Sony, LG and other mobile phones and portable devices.

Step 1. Download and Install

There are both Windows and Mac version for you to choose. Download the right version of VideoSolo Free Video Converter to your PC. VideoSolo Free Video Converter has a simple and intuitive English interface, so you can easily use this software for video conversion and other converting needs.


Step 2. Add Files to Program

Click "Add Files" button to open file browser then choose the file you desire to convert. In addition, you can add multiple files at one time.

Add Files

Step 3. Choose the MP4 Format as Output Format

In the "Output format" box, you can choose the MP4 format according to your mobile device.  Or you can directly use the search box to look for the corresponding output format, this is more convenient.

Choose the MP4 Format

Step 4. Start Converting AVI to MP4

After making sure all files added and output formats chosen properly, you can now click "Convert" button to start conversion. The conversion will finish automatically in moments.

Converting AVI to MP4

Converter AVI to MP4 with Online Video Converter

Online-convert.com is a website that eliminates the hassle of installing software and offers free, fast, online video and audio conversion. It supports a lot of different source formats such as AVI, MKV, FLV, MP4, MOV, etc.You can customize the audio quality, screen size frame rate, and other settings during the conversion.


Step 1. Open your browser and visit: https://video.online-convert.com/convert-to-mp4.

Step 2. Click "Convert to MP4" button and "Choose" button to open file browser then choose the AVI file you desire to convert.

Step 3. You need to wait for a moment and then when the conversion is finished, you can start to download the file.

Online Video Converter

Above all, these are two free and simple ways for you to convert your video or audio from AVI to MP4. A good tool can help you complete your work much easier. It can not only save your hard disk space but also save your money and time! But, to be honest, the free software must have its limitations. If you want to enjoy more extra functions, you can upgrade to VideoSolo Video Converter Ultimate.


VideoSolo Video Converter Ultimate is the full version of VideoSolo Free Video Converter. It is specialized in converting videos to many formats, including MOV, MP4, MPG, AVI, FLV, M2TS, MTS, RMVB, AVCHD, MKV, WebM (V8), QT, WMV, VOB, 3GP, DivX, etc. It is a wonderful one-stop tool to convert, download, edit and enhance videos at a faster speed. The full version comes with many other impressive features such as downloading video and enhancing video quality. You can experience it with the trial version.