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.

Part 2: Top 3 Free Video Converters for Mac. Without needing to go to Mac Apple Store for a reliable video transcoder from the vast selection of 3rd party apps, here we list 3 most welcomed free Mac video converter software that features speedy encoding and delivers good-looking image, if you are unwilling to get an expensive piece of software. Movavi Video Converter for Mac is one of the fastest and most error-free ways to export your video, photo, and audio files to any desired format. Download this bestselling conversion software and experience your multimedia collections without format limitations! Download Free Video Converter for Mac to convert video and audio files to any format and for any device. Free Video Converter has had 0 updates within the past 6 months.

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:

• 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 Run button of the free AVI to MP4 converter.

Part 2. Top 5 AVI to MP4 Converter Online and Free

11. Online Converter

Online Converter offers various file converters, including a free AVI to MP4 converter. Its features include:

• 1. Import AVI files from hard disk, cloud services or websites.
• 2. Convert AVI, FLV, M4V formats to MP4 online.
• 3. Provide extensive custom options.

When it comes to how-to, you can upload an AVI video from PC or Google Drive and click on Convert file button to complete conversion and download.

12. Online Video Converter

If you need a free AVI to MP4 converter online, Online Video Converter is one of the best choices. Its features include:

• 1. Transcode AVI videos to MP4 or other formats online.
• 2. Set start point and end point to cut the video as the video cutter.
• 3. Decide the output quality.

It supports one-click conversion. So, after import an AVI file and customize output format and other options, hitting the Start button will complete the process.

13. AConvert

As a free AVI MP4 video editor and converter, AConvert's features include:

• 1. Encode local or online AVI videos to MP4.
• 2. Cut, merge, rotate or crop videos online.
• 3. Create unique videos with custom options.

Once you upload an AVI on the home page and set MP4 as target formats, clicking Convert Now button will take you to the result page when it is done.

14. Files Conversion

Files Conversion's video encode app is another free AVI to MP4 converter. Its features include:

• 1. Upload videos from computers or URL for converting to MP4.
• 2. Encode AVI to MP4 for portable devices.
• 3. Customize result quality and size.

Similar to other online video converter, all you need to do is to upload an AVI video, choose MP4 from format list and click Convert button to evoke the conversion process.

15. HD Convert

HD Convert works for converting HD videos online. Its features include:

• 1. Encode HD videos to MP4 or other formats.
• 2. Offer preset solutions.
• 3. Convert AVI to MP4 automatically.

This free AVI to MP4 converter is able to convert video online easily. Choose MP4 converter and upload an AVI video. It will do the rest work automatically.

Part 3. How to Convert AVI to MP4 for Free with Free Trial

The above free AVI to MP4 converter can easily help you to free transfer AVI to MP4 for free. However, another way of exporting AVI to MP4 is using the free trial of an excellent video converter. Actually, many video converters in the market support a free trial, and you could benefit from the rule exactly. AnyMP4 Video Converter Ultimate is one of them, and let's check its functions one by one:

• 1. Lossless conversion. It is able to convert video formats without damaging quality, including the resolution from SD to HD, even 4K UHD.
• 2. Higher compatibility. This video converter supports almost all video and audio formats.
• 3. Video editor. The built-in video editor offers basic editing tools, like clip, merge, rotate, mirror, watermark, effects, 3D, etc.
• 4. Extract sound from video or DVD easily.
• 5. Rip DVD. It also has the capacity to extract video and audio from DVDs.
• 6. Add or delete subtitle, extra-audio track, etc.

How to use AnyMP4 Video Converter Ultimate

Step 1: Download and install software on your PC

Above all, just download the AnyMP4 Video Converter Ultimate from AnyMP4 website, and then you should install it on your computer.

Step 2: Run program and choose Add Files

After you finish installation, open this application. Afterwards, click 'Add Files' icon to choose the video that you intend to convert it to MP4 online. This option is the second one at the top of the interface.

Step 3: Edit the video to be perfect

Next, click the 'Edit' icon. After that you can adjust video rotate, crop, watermark, filter and effect according to your requirement. Regarding this step, you can just skip it directly if you don't need to modify or polish this video, you can skip it directly.

Step 4: Choose the video output format

Then, hit the inverted triangle in the box next to the 'profile' text to choose the MP4 format. And then, tap the 'Save to' column to select the save location.

Step 5: Start to convert video

Once you have finished all the steps above, you can click the 'Convert All' choice at the bottom of the interface.

Conclusion

In this article, we have shared top 15 free AVI to MP4 converters in detail. Some are best desktop programs; others are to online video converters. You can discover most appropriate video converter software based on our introductions. Moreover, when you need to convert videos, you can follow our guides to get what you want easily.

Part 4. FAQs of Converting AVI to MP4

1. Is AVI better than MP4?

Video Download Software For Mac

AVI video has better quality. If you prefer better quality, you can choose AVI, but if you prefer to save space, MP4 is a good choice.

2. Can I convert AVI to MP4 with HandBrake?

Yes. Handbrake is one of the converters that you can use to turn AVI to MP4. It can convert many formats, and it's totally free and works best with Linux, Mac and Windows platforms.

3. How do I convert AVI to MP4 on Mac?

You can try AnyMP4 Free MP4 Converter to change your AVI videos to MP4 on Mac. You just need to Download the program from Mac App Store and install it on your Mac computer. When you need to convert AVI videos, launch the program. Then add the AVI files to this program and choose MP4 format as the output file. In the end, click the Convert button to start your conversion.

4. Can I extract audio from AVI videos with VLC?

VLC is a popular media player and free of charge. You can find more powerful features in it, such as convert AVI to MP3 or other audio formats, rip DVD, record streaming, and more. 

MKV vs MP4

MKV (Matroska) and MP4 (MPEG-4) are both container formats to store video and audio. MKV is a flexible, open standard video file format wildly used for HD videos. MKV is also the basis of WebM video, which is dedicated to developing a high-quality, open video format for the web that is freely available to everyone. It has better support than MP4 for some features like subtitles, multiple video and audio tracks and chapters.

However, MP4 has much higher compatibility and better performance than MKV video on multiple Media Players, Mobile Phones, and Portable devices, that is why many users need to convert MKV to MP4. Multiple MP4 files are easier to save and large or separate files can be saved into one single file. MP4 files are more user friendly in terms of copying, moving, uploading, and playing. You can easily enjoy MP4 video on MP4 Player, X-box 360, PS4, iPhone/iPad/iPod, and Android devices.

So, how to convert MKV file to MP4 video on windows and Mac? Don't worry, we will provide top 5 Free MKV to MP4 Converters and one professional tool with more powerful functions like editing features and 4K/1080P HD video settings, and you can choose the preferred one for converting MKV video.

Part 1: 5 Best Free MKV to MP4 Converters with converting guides

1. VLC - Windows and Mac

VLC Media Player, the Free and open source cross-platform Player software, helps you play most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols. Also with the converting function, you can even convert MKV to MP4 file with several clicks. How to convert MKV file to MP4 format using VLC? Here's the overall guide.

Download the latest VLC, which provides different platform for you to choose. Then install it on your PC and start to run the software. Click the Media tab in the top toolbar from the main interface, and select Convert / Save... to enter into Open Media window.

In the Open Media window, click Add button to select local MKV files. After that, it should be added to the list. (Alternatively, you can drag & drop a file into the list.). Click Convert / Save button on the bottom of the File window to enter into Convert window.

You can select Video - H.264 + MP3 (MP4) as out profile, and then click 'Tool' Button to open Profile Edition window, here you are allowed to choose video/audio codec and subtitles for output MP4 video file. Click Save button to save all the profile settings and close the window.

Come back to the Convert window and customize the Destination where you need to save the output file.

Change MKV to MP4 format, you just need to click Start button at the bottom of the Convert window. The timeline will turn into a progress bar, waiting for a while and the converting process will complete.

2. Freemake Video Converter - Windows and Mac

Freemake Video Converter is also a Free MKV Video to MP4 Converter software, which has the ability to convert MKV and also other popular formats like AVI, MOV, WMV, TS, MP4, FLV, MP3 to needed video/audio format. Import photos or audio files to turn multimedia to video. Convert multiple videos at once. All modern codecs are included: H.264, MKV, MPEG4, AAC. How to change MKV to MP4 file with Freemake Video Converter? Here is the easiest steps.

Launch Freemake Video Converter. Click '+Video' button or just drag & drop all the MKV videos you want to convert to MP4.

Click 'to MP4'. Choose a ready preset (better 'Same as source') or create your own one.

Click 'Convert' and wait till the MKV to MP4 conversion is completed.

3. HandBrake - Windows and Mac

HandBrake is a Free tool for converting video from nearly any format to a selection of modern, widely supported codecs. MKV and AVI are both easy to convert to MP4 with HandBrake. You are allowed to select your conversion settings in just a few seconds or spend a while tweaking them in detail, whichever you prefer.

Install and launch HandBrake, click the 'Source' button on the toolbar, select 'Open File', and open your MKV file.

Click the 'Browse' button under 'Destination', choose the folder the new MP4 file will be saved to, and enter a name for it.

Under Output Settings, the MP4 container format should be selected by default. If you don't want to do anything extra, you can now just click the Start button and HandBrake will convert your MKV video to MP4 file.

[Optional] If you'd like to set more quality settings, you can click around using the tabs at the bottom before clicking the Start button. You're free to set a new height and width for the video, crop it, add filters, change the video quality setting, choose a video codec (but you should probably use the default H.264 (x264) codec), choose codec profiles, import SRT subtitle files, and customize audio tracks.

4. Free Video Converter - Windows

Free Video Converter is totally free MKV MP4 Converter for Windows users to convert videos like MKV to MP4, and other popular videos with zero quality loss. It can convert between 300+ formats for free and support multiple portable players and devices. After converting, you are easily watch converted MKV video/movie on iPhone/iPad/iPod/Sharp/HTC/Google/Sony/LG, and more.

Besides, it provides the editing video function, which lets you add opening and ending title with different images themes and words. There are many animal themes, beautiful landscapes throughout the year as the opening and ending theme in your video. What's more it helps you edit words with title, author and time, etc. Blow is the steps on how to use the best Free Video Converter for Windows.

Download this Free Video Converter and install it to Windows PC. Run it to open the main interface.

Apple Video Software For Mac

Click 'Add File(s)' to check the MKV video file(s) which you want to convert.

If you want to enrich your output MP4 video, you can click 'Edit' to add opening and ending theme and words to edit your own video title.

Click the dropdown button of 'Output format' to choose the target video format. And 'Convert' the video with one click.

5. Free-Make Video Converter - Mac

Free-Make Video Converter is easy-to-use Free MKV to MP4 Converter for Mac users, which has the ability to convert between 300+ formats like MP4, MOV, AVI, MKV, FLV, WMV, TS, MPEG on Mac OS. Besides common videos, it can even convert MKV to 4K/1080p HD video to enjoy on iPhone, iPad, iPod, Samsung and more Android devices for Free.

Besides, it has many edit functions to personalize the video at will. You are able to trim and clip the video length, crop video area, add watermark and adjust video effect like Brightness, Contrast, Saturation, and Hue. With 6x fast conversion speed, all converting processes would be finished in second time.

Download Free-Make Video Converter on App Store and install it to your Mac. Open the software and click 'Add file' button to load the MKV file.

Click 'Profile' button and select 'HD H.264/MPEG-4 AVC video (*.mp4)' or 'MPEG-4 Video (*.mp4)' format. Then click 'Settings' button to adjust video/audio settings.

This excellent free video file converter is also a great video and music editing software enables you to edit MKV video according to your need. With the software, you can conveniently clip the target video into segments, or add 3D effects or customized text or image watermark and so on.

Last, click 'Convert' button at the bottom-right corner in the main interface, and convert the target MP4 video.

Part 2: How to convert MKV to MP4 with the powerful Converter software

Tipard Video Converter Ultimate is also a MKV to MP4 Video Converter software. This excellent and reputable software supports you to convert MKV videos to MP4, AVI, MP3 and more others. It also converts any 4K Ultra videos to 4K /1080p HD video and others your needed. Thus, you are able to play Ultra HD video on any 4K TV like Samsung, Sony, Vizio and others, play HD video on mainstream digital devices like iPhone 11/ XS/XR/7/7 plus, iPhone SE, iPhone 6s/6s plus, iPhone 6/6 plus, iPad, iPod, Samsung Galaxy, and more.

Below are the editing features for you to customize the MKV file:

• 1. It allows you to improve the video quality by using the excellent editing features.
• 2. It is necessary to resize the videos, rotate or flip video clips and crop the videos before any further edit of MKV videos.
• 3. Adjust the effects and filters of the video files and audio files, de-interlace the video files for a better preview experience.
• 4. In order to protect the video file, you might also need to add watermark when you edit the video files.

Load any MKV Video files you want to convert by choosing Add Files button to load the MKV files or the whole folder in the main interface. Or you can click the big plus button to add the MKV files.

Based on the formats supported by your portable devices, you can select the output format for the movie from the drop-down list of Convert All to.

Detailed video and audio settings are provided by this MKV to MP4 video converter software for you to adjust, such as video Encoder, Frame Rate, Resolution, Bitrate and audio Encoder, Channels, Sample Rate, etc., by clicking the settings icon next to the putout MP4 format. Even more, you can input your own parameters. The well-customized profile can be saved as new creation for your later use.

Click the Edit option in the star image in the main interface to make any change for the MKV to MP4 videos. You can rotate or flip MKV video, crop and trim video clip, add video effects for MP4 video, add the filters, edit the background audio track and subtitle, and add watermark for MP4 video.

Free Video Converter Programs For Mac

Click Convert All button to start to convert MKV Video to MP4. And then you can enjoy your MKV video on your portable devices anywhere.

Best Video Conversion Software Windows

• The Easiest Way to Convert YouTube Video on Windows/Mac/iOS/Android

  Want to convert YouTube video to MP4/MP3? We list several best YouTube converters for Windows/Mac/iOS/Android to convert YouTube to MP4/MP3 in this post.

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  Do you want to convert MKV to MP4 without downloading software? This article introduces top 10 MKV to MP4 online converters.

• WebM to MP4 – 10 WebM to MP4 Converter on Mac/Windows/Online

  10 methods to convert WebM to MP4. There are 5 online WebM to MP4 converters and 5 paid video converters you can choose.

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