Top 7 Methods to Convert AVI to MP4 (Free!)

Do you have some videos with the .avi extension stored on your computer or mobile phone? AVI video files are often large and have poor compatibility with non-Windows apps. Therefore, many convert AVI format to MP4 for easier playback, editing, uploading, or storage on different platforms. The following article shares the top seven ways to compress/convert AVI to MP4. Get the best AVI to MP4 converter to start your work for free:

Vita Vita | Jul 11, 2023

How to Convert AVI to MP4 Free – 7 Ways

1. Free HD Video Converter Factory

2. VLC

3. HandBrake

4. FFmpeg

5. QuickTime Pro

6. CloudConvert

7. Transcribe by Wreally

Extended Reading: AVI vs MP4

1. Free HD Video Converter Factory

It’s effortless to convert AVI files to MP4 with the right tool in handy. One of the most well-received video converters in the industry is WonderFox Free HD Video Converter Factory. It stands out from video converter programs for its strong capability of dealing with all common types of video/audio files, user-friendly operation, and lightning-fast conversion.
Using this program, you can convert large video files to MP4 quickly and with high quality kept. You can also use its built-in downloader to save online video and audio files and convert them to MP4, MP3, MOV, WMV, WebM, etc. There’s no file size limit and no watermark left on the output video.

Now, downloaddownload the best free AVI to MP4 converter on your PC. Let’s see how to convert AVI to MP4 fast.

Free Download

Compatible with Windows

100% Clean & Safe

Free Download

How to Convert AVI File to MP4 Effortlessly?

Step 1. Add AVI File to the Program

Run Free HD Video Converter Factory on your desktop and select Converter. Then click Add Files to import your AVI video file or directly drag and drop it into the interface.

Choose Source File

Step 2. Change Output Format to MP4

Click the format image on the right side of the main interface. Head over to the Video tab and select MP4 as the target format.

If you have advanced requirements for the output video settings, go to Parameter settings, where you can modify the video bitrate, encoder, resolution, frame rate, audio channels, sample rate, volume, etc. Don’t forget to press the OK button to save your changes.

Select MP4 Format

Step 3. Export MP4 File

Hit the inverted triangle button at the bottom to specify an output path. Finally, click Run to start the conversion. The process will take a few seconds to minutes, depending on the file size. Once done, the program will save the final MP4 file to the folder you set before.

Turn .avi into .mp4

Tips. Besides converting local and online videos to MP4, WonderFox Free HD Video Converter Factory allows you to edit video files using simple editing tools. You can trim and crop the video to remove unwanted parts, rotate the video 90 degrees, flip the video vertically or horizontally, apply special effects, add subtitles and watermarks, merge several clips into a single file, etc. It’s quite a versatile and functional video converter program. Just give it a try (at 0 cost!)

Excellent AVI MP4 Converter

Offering over 300 output presets, Free HD Video Converter Factory lets you not only convert AVI to MP4 but MKV to AVI, MP4 to MP3, MP3 to WAV, etc. Also, it provides an additional video downloader, editor, and quality enhancer. Get the free software now!

2. VLC

Besides being a powerful cross-platform media player, VLC can convert video file formats, edit videos, capture screens, and rip DVDs/CDs. It offers several profiles for video conversion such as MP4, WebM, TS, and video for TV, Android, and YouTube. It also allows you to change the video codec, bitrate, quality, etc., or create new profiles based on your needs.

As an open source program available on all operating systems, including Windows, Mac, Linux, Android, and iOS, VLC Media Player is the preferred option for many users. If you have installed the program, follow the steps to convert an AVI file to MP4 free in VLC:

Step 1. Launch VLC Media Player. Click Media in the upper left corner and select Convert / Save (or press Ctrl + R).

Step 2. Make sure you are in the “File” tab. Click + Add to choose AVI video files and click Open to load them into the program.

Tips. VLC supports converting files in batches (you can add multiple AVI files at one time).

Step 3. Click the Convert / Save button at the bottom of the “Open Media” window.

Step 4. Navigate to Profile and select Video – H.264 + MP3 (MP4) as the output format. If you convert one video, set an output destination. If you convert multiple files, leave it as default.

Step 5. Finally, click the Start button and wait for the conversion process. You can see the progress bar on the main interface of the VLC media player. Once it’s ok, check the resulting MP4 files in the output folder.

Convert AVI to MP4 VLC

3. HandBrake

HandBrake is one of the best free MP4 video converters that can convert AVI, MOV, MKV, M4V, WebM, WMV, VOB, MTS, M2TS, DVD, and other video files to MP4 format without cost. Though it only provides three output container formats (MP4, MKV and WebM), there are a lot of presets with different codecs, resolutions, frame rates, and video lengths for general, web, or device usage. For example, HandBrake converts an AVI movie to MP4 with H.265 video and AAC audio in 4K 60fps (preset: Very Fast 2160p60 4K HEVC).

Here is the most straightforward way to turn AVI into MP4 with HandBrake. Download the software on your Windows or Mac computer from the official website first:

Step 1. Run this free AVI to MP4 converter on your desktop. Click Open Source and select File to open a single video file or Folder to batch scan files. Then, click Open to add your AVI file to HandBrake.

Step 2. Go to the Summary tab and change the Format to MP4.

Optional. You can flip, rotate, crop, and adjust the resolution in Dimensions, apply effects in Filters, change video encoder, frame rate, and quality in Video, alter audio codec, bitrate, channels, and sample rate in Audio, add a new subtitle track, and create chapter markers.

Step 3. Click Browse at the bottom of the software to set an output path and file name.

Step 4. Press the green Start Encode icon to begin the conversion.

HandBrake Convert AVI to MP4

4. FFmpeg

Another free and open-source video converter for Windows, Mac and Linux is FFmpeg. It is a suite of libraries and tools to process video, audio, subtitles, and other multimedia files. Since at its core is the command-line ffmpeg tool itself, you have to find and input the correct command line to make FFmpeg convert video/audio files. Beginners may have great difficulty handling this software. If you want to try this method, follow the simple guide of FFmpeg AVI to MP4 below.

Tips. There are many discussions about video conversion in FFmpeg over the Internet, like converting AVI to MP4 without losing quality, compression, or re-encoding. Learn the complete tutorial: [Step-by-Step] How to Convert AVI to MP4 with FFmpeg

Before start, FFmpeg AVI to MP4 converter download here:

Step 1. Open the folder where your AVI video is. Click to select the full file path and type CMD. Press Enter to bring up the command window.

Step 2. Input the following command line:
ffmpeg -i input_filename.avi output_filename.mp4 (re-encoding)
ffmpeg -i input_filename.avi -c:v copy -c:a copy output_filename.mp4 (without re-encoding)
and press Enter to let FFmpeg convert AVI format to MP4.

Step 3. Check the output video file in the same folder as the input file.

Turn AVI into MP4 FFmpeg

5. QuickTime Pro

Though QuickTime Pro is no longer available to download from the Apple website, if you already installed the Pro version on your Mac, you can use it to change the video format to MPEG-4. QuickTime Player can open AVI files with Motion JPEG video. Therefore, you can convert these AVI files to MPEG4 format with QuickTime Pro. The software is easy to operate. Follow the steps to convert an AVI file to MP4 on Mac via QuickTime Pro:

Step 1. Start QuickTime Pro and go to the “File” tab. Open the AVI file you want to convert.

Step 2. Open the “File” menu and select “Export” from the drop-down options.

Step 3. Choose “Movie to MPEG-4”. (See MPEG4 vs MP4)

Step 4. Click the “Save” button to start the conversion.

Tips. To create an MPEG-4 movie for Apple TV or iPod, select Movie to Apple TV or Movie to iPod from the Export menu. All MPEG-4 options will be set to the appropriate values for you.

Convert AVI to MP4 Mac

6. CloudConvert

CloudConvert is an online video converter that converts video files directly on the website. Without downloading any software, you can convert your video, audio, document, e-book, archive, image, and other multimedia files efficiently. Most conversion types can be adjusted to your needs. For converting AVI files to MP4, you can change video CRF, FPS, resolution, aspect ratio, audio bitrate, and other settings, trim video length, add SRT or ASS subtitle file, add PNG file as a watermark, set keyframe interval, etc. Here is how to convert AVI to MP4 online free with CloudConvert:

Step 1. Visit the website:

Step 2. Click the Select File button to add your AVI video file.

Note: This online converter tool supports importing multiple files from your computer, Google Drive, Dropbox, OneDrive, or URL. Yet the max file size for free accounts is 1GB; you can sign up for its plan for converting larger files.

Step 3. Adjust the related options and press the Convert button to start the conversion.

Step 4. Save the converted video file to your computer or cloud.

Hot Search: AVI to MP4 Converter Online Over 1GB | MKV to MP4 No Limit | Change Bitrate of MP4

AVI to MP4 Converter Free Online

7. Transcribe by Wreally

Another free AVI to MP4 converter online is Transcribe by Wreally. Unlike many online converters, Transcribe performs file format conversions within your browser instead of uploading files to its server. When you select a file, it reads the AVI content into your browser and converts it into MP4. After that, it will save the file back to your computer. No one except you will ever have access to your files. The interface is intuitive and user-friendly without intrusive ads showing up on the site. The process is simple. Let’s see how it works:

Step 1. Go to on your web browser.

Step 2. Click Choose AVI File to add an AVI video from your computer.

Step 3. Transcribe will read and convert your AVI file to MP4. Leave this page open until the conversion is fully complete. (Tip. It should take about 15 minutes to convert a 30-minute AVI file to MP4.)

Step 4. Once the conversion is done, it will automatically save the converted MP4 file to your computer.

Convert AVI Movie to MP4 Online

Extended Reading: AVI vs. MP4

AVI and MP4 are two commonly used file formats in daily life. They are both video container formats, and AVI uses the DivX codec while MP4 uses the MPEG-4 AVC/H.264 codec. MP4 is generally considered better than AVI because it offers higher video and audio quality, smaller file size, and support on more players and devices. If you plan to store or distribute video content online, MP4 is the best option.

Now, we have walked through all the methods to convert AVI to MP4 on Windows/Mac/online. Have you found your favorite solution? If not, try the most recommended Free HD Video Converter Factory (simple, fast, practical!)

Free Download

Compatible with Windows

100% Clean & Safe

Free Download
The Best AVI to MP4 Converter for Download
WonderFox HD Video Converter Factory Pro

WonderFox HD Video Converter Factory Pro

1. Convert video/audio to 500+ formats without limit.

2. Download videos from YouTube and 1000+ sites.

3. Record computer screen with sound/in high quality.

4. Make GIFs and ringtones, extract subtitles, etc.

5. Edit video files and change video/audio settings.

6. Support batch conversion and hardware acceleration.

Specialized in multimedia software solutions.
Since 2009

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