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An AVI to MP4 converter is a specialized file converter that allows you to transcode AVI videos to MP4 files. It helps not only to reduce the size of the files, but also lets you enjoy your favorite movies on mobile phones.

Video conversion is never an easy task, not to mention using a free AVI to MP4 converter.

So, it makes sense that many people left messages to complain that their videos were damaged by video converters.

Therefore, we identify best 15 free AVI to MP4 converters for you, and also the simple guide of converting AVI to MP4 is attached.

Part 1. Best 10 Free AVI to MP4 Converter Software for Windows and Mac

1. Aiseesoft Free Video Converter

Platform: Windows, Mac

Aiseesoft Free Video Converter is another popular video converter. Apart from encoding AVI to MP4, it also lets you:

1. Encode AVI format to more than 300 formats, and convert MP4 to AVI and other formats for free.
2. Customize the output settings like codec, bitrate, resolution (up to HD).
3. Edit opening theme and ending theme.
4. Batch convert AVI to MP4 on computer.

This free AVI to MP4 converter is easy to use. After importing one or several AVI videos and choose MP4 from the dropdown list of 'Output format' as the output format, and one-click on the Convert button will complete the job.

2. Handbrake

Platform: Windows, Mac, Linux

Handbrake is an open source AVI to MP4 converter. Its main features include:

1. Convert AVI videos to MKV, M4V, MP4, AAC, FLAC, MP3, etc.
2. Extract MP4, MOV, FLV, WMV, MP4, etc. videos from DVDs.
3. Support 4K resolution AVI to MP4 conversion.
4. Offer extensive custom options.

How to use Handbrake to convert AVI to MP4

Step 1: Go to 'Source-> Open File' to import the AVI video into the program. Drop a folder to save the output in 'Destination' area.

Step 2: Choose MP4 on the 'Container' list and click 'Start' button.

3. Miro Video Converter

Platform: Windows, Mac, Linux

Miro Video Converter is a free AVI to MP4 converter for Mac, Windows and Linux. Let's check what is also supported apart from free converting AVI to MP4:

1. Support drag-and-drop command.
2. Convert video to various devices.
3. Easy to transfer files to MP4, WebM, OGG, MP3, etc.

How to use Miro Video Converter Mac

Step 1: Connect your phone to the Mac computer and launch the program. Drag and drop the AVI videos into it.

Step 2: Choose a target device or MP4 from 'Format' area and hit 'Convert to WebM SD' to start converting.

4. FFmpeg

Platform: Windows, Mac, Linux

FFmpeg is another open source command line AVI to MP4 converter. Apart from being the AVI to MP4 converting freeware, it also highlights for the following reasons:

1. Include libavcodec, the leading open source codec library.
2. It is fast to convert AVI to MP4 for free if you are not beginners.
3. Fast video conversion from AVI to MP4.

How to use this free AVI to MP4 converter

Step 1: Click 'Open' button to load the AVI video and then hit 'Save As' to select a folder to save the result.

Step 2: Choose MP4 on the 'Video Codec' list and click 'Encode' button to start encoding AVI to MP4.

5. AnyMP4 Free MP4 Converter

Platform: Windows, Mac

AnyMP4 Free MP4 Converter is one of the best free AVI to MP4 converter. Its key features include:

1. Convert AVI format to MP4 without quality loss.
2. Adjust video effect, rotate, flip, add watermark, clip and merge, etc.
3. Convert MOV/MKV/AVI/WMV/FLV/VOB/SWF/M4V to MP4.
4. Encode multiple videos in one click.
5. Preview video effects before converting.

How to convert AVI to MP4 for free

Step 1: Run the free AVI to MP4 converter and import several AVI videos to convert by clicking 'Add File' button.

Step 2: Choose MP4 on the 'Profile' menu and drop a destination. Finally, click 'Convert' button to encode AVI to MP4.

6. VLC

Platform: Windows, Mac, Linux, Android, iOS, Chrome OS, and more

VLC is a both a media player and a free AVI to MP4 converter. Apart from converting AVI to MP4, it also has the following features:

1. Convert AVI to MP4 and other video formats, like DVD, MKV, FLV, MOV, WebM, MPEG, etc.
2. Grab online videos and download in MP4.
3. Support H.264, H.265, DivX, VP8 codec.
4. Play and stream multimedia online and offline.

How to use VLC Media Player as a video converter

Step 1: Go to 'Media' menu and click 'Convert/Save' option to open the 'Open Media' dialog.

Step 2: Click Add button in File tab to import AVI video. Then unfold the 'downward' icon and choose 'Convert'.

Step 3: Pick up 'MP4' on the 'Profile' list and click on 'Start' button to begin converting.

7. WinX Free AVI to MP4 Converter

Platform: Windows

WinX Free AVI to MP4 Converter is a free AVI to MP4 converter tool. Its features include:

1. Transcode AVI to MP4, MOV, MPEG, WMV, MP3, etc.
2. Compress MP4 before converting from AVI.
3. Merge, crop or trim videos.
4. Hardware acceleration support.

When you want to convert videos, drag and drop them into the program and click on Run button. The program will complete the process.

8. Freemake Video Converter

Platform: Windows

Freemake Video Converter is a popular free video converter for PCs. Its features include:

1. Compress the output MP4 files before converting.
2. Download and convert online AVI files to MP4 directly.
3. Rip AVI, MP4, etc. videos from DVD and burn MP4, AVI, and more files into DVD disc.
4. Edit MP4 files before converting, like merge, clip, rotate, etc.

After upload AVI videos into the free AVI to MP4 converter, you can click on 'to MP4' option to start the conversion process.

9. Any Video Converter Free

Platform: Windows, Mac

As its name said, AVC is a free AVI to MP4 converter as well. Its features include:

1. Support HEVC/H.265 Video Coding.
2. Download online videos to from YouTube, etc.
3. Extract videos and audio from DVD or video.
4. Edit and enhance videos.

This video converter supports two-step video conversion. Import an AVI video, choose MP4 from the output format list and click on Convert Now button to finish the operation.

10. Free HD Video Converter Factory

Platform: Windows, Mac, Linux, Android, iOS, Chrome OS, and more

The free version of HD Video Converter Factory is another choice to convert HD AVI to MP4. Its features include:

Free Audio Format Converter For Mac

1. Convert AVI videos from computer locally or URL to MP4.
2. Download HD videos from YouTube, LiveLeak, Vimeo, MetaCafe, Facebook, etc. to MP4.
3. Merge video clips, remove subtitle, add filter effects to video before converting.

After load AVI videos and choose MP4 from the output list, you can get what you want by clicking on the

Format Converter For Mac Free