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Like MP3, M4A is also an audio file. It is a pure audio file created in MP4 format. MP4 has files that contain audio and video data and files that only contain audio data. M4A files can be compressed with lossless sound quality and saved in smaller files at the premise of original quality. The biggest disadvantage of the M4A format is that it has poor compatibility and cannot be widely played on all devices or players. That is why people convert M4A to MP4 online. This blog post will discuss the best M4A to MP4 converters available online.
In this article
Part 1. Top 10 M4A to MP4 & MP4 to M4A converters online
1. FreeConvert

Average Rating | 4.6 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
FreeConvert supports over 500 media file formats. Just upload your M4A files and convert them to MP3 format. If not, you can also upload from Google Drive and Dropbox. While most online converters allow you to upload a maximum of 20-50MB file(s) on their site, FreeConvert has a limit of 1GB and it is all for free.
Pros
It provides optional settings to customize the appearance of your output file;
It offers support to several categories of file formats;
The conversion process is simple, as it involves a few clicks.
Cons
There is a limit to the maximum size of the file uploaded;
The interface is not intuitive.
2. Zamzar

Average Rating | 4.2 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
Zamzar is a great online M4A to MP4 converter. This free online converter supports over 1,100 formats. Zamzar's greatest versatility is its ability to convert files from a URL without the need to upload. Using Zamzar to convert any music, video, document, or image gives you excellent results. Then click "Convert" and "Receive" your converted files immediately in your Email. Try its premium subscription to access more sophisticated features.
Pros
Device presets;
Converts videos from video-sharing service;
Many output formats: 3GP, 3G2, FLV, MOV, MP4, MPG, WEBM, WMV; AAC; AC3, FLAC, MP3, OGG, WAV; device presets;
Advanced conversion settings.
Cons
Doesn't support cloud services;
It imposes a limit on the size of the file uploaded.
3. Free Online File Converter

Average Rating | 4.1 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
The Free Online File Converter tool offers people some of the easiest ways to convert M4A to MP4. You can drag and drop the file onto the space provided or click browse to select a file from your computer to use this online converter. The service is fast, and the converted file can be downloaded with a click on your computer.
Pros
Easy upload and download of converted files;
Almost all files can be converted to any format of your choice;
No need to provide personal details like email;
Offers cheap membership rates with 3 plans with no ads.
Cons
Free service limited to 2 files per conversion.
4. Online Audio Converter

Average Rating | 3.9 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
Online Audio Converter is a free online M4A to MP4 converter. With over 300 file types supported, you may extract audio from videos and choose the output format and quality before converting. Their site clearly states the three simple conversion stages. Explore their characteristics.
Pros
It supports several types of media file formats;
The conversion speed is fast and secure;
It has simple conversion processes.
Cons
Limited features.
5. AnyConv File Converter

Average Rating | 4 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
AnyConv File Converter converts M4A to MP4 quickly. Fonts, CAD, and MESH are supported audio and video files. The utility can convert PDF, CSV, HTML, and DOCX documents. The UI is simple. It has commercials, but they aren't too intrusive. This web-based program is simple and can handle files up to 500MB. Approximately 300 file types are supported.
Pros
The conversion process is simple and involves a few clicks;
It supports a wide range of different file formats;
It supports batch conversion.
Cons
The interface is not tidy;
It imposes a file size limit.
6. Aconvert

Average Rating | 3.1 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | X |
No Ads | ✓ |
No Watermarks | X |
Aconvert is a fashionable and functional key converter software amongst users worldwide. The conversion process is simple, and newbies can even navigate with ease. The free online platform supports multiple formats like M4A, MP3, MP4, PPT, TXT, HTML, and JSON, to mention but a few.
Pros
It supports a wide range of different file formats;
The interface is straightforward, and users can navigate with ease;
It supports batch conversion.
Cons
It requires a steady internet connection;
It imposes a file size limit.
7. Convertio

Average Rating | 4 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
Covertiois a web-based converter that simplifies transcoding. This free online converter allows users to add subtitles and captions to videos. It also includes "Office Utility Tools" like OCR and file converters and supports 3400 file formats. That's why Convertio is one of the top converters listed here.
Pros
Converts to uncommon video formats;
Supports batch conversion;
Import videos from Local, Google Drive, Dropbox, URL;
Supports multiple output formats.
Cons
No conversion settings.
8. FileZigZag

Average Rating | 4.6 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
FileZigZag converts M4A to Mp4 in just a few clicks of the mouse. FileZigZag audio converter software lets you convert the files instantly. Moreover, highly supported by the formats of each type like documents, video, audio, image, eBooks, etc. To produce the best-ever quality conversion, FileZigZag uses the highly-sophisticated conversion algorithms.
Pros
Quick converting process;
Highly-advanced conversion algorithms;
100% free of malicious and unwanted programs;
supports more than 3000 conversion formats.
Cons
Each uploaded file cannot be over 50MB.
You need to upload the file to the website before conversion. So a good internet connection is required.
9. Xconvert

Average Rating | 4.2 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
XConvert has finished your search for the best M4A converters. Free M4A to MP4 conversion using Converter X. You can do this with Converter X. Clearly, Conversion X is the best and fastest converter tool. The software accepts a few unusual audio inputs.
Pros
Extremely easy to use;
Ace sound quality;
Encodes multiple files at a time.
Cons
Its supported output formats are not as many as other online converters.
10. CloudConvert

Average Rating | 4.7 |
Convert M4A to MP4 | ✓ |
Convert MP4 to M4A | ✓ |
No Ads | ✓ |
No Watermarks | X |
CloudConvert is the recommended conversion tool because of its high-quality conversions, strong data protection, and API connectivity. It gives you more control over your files and converts both local and online files. This tool supports over 200 audio, video, document, eBook, spreadsheet, and presentation formats. It also works on every OS. You can pre-trip audio files and convert up to 25 tracks each day for free.
Pros
A ton of high-quality file conversion options;
Supports popular cloud services;
Platform/Device-independent;
User-friendly;
Supports batch conversion.
Cons
Limits free usage to just 25 conversions per day.
Part 2. The best M4A to MP4 converter offline recommended
Online video converters are used to change video file formats on the Internet. But there are many limitations of online video converters such as:
- Online video converters require a fast and reliable Internet connection. If your Internet connection is slow, the conversion will take a lot of time.
- The output video files contain the watermark.
- Too many Ads.
Offline video converters are a traditional video conversion solution. This software has many functions and is easy to use. You don't need to be a pro. The rest is simple after it is installed on your computer. Offline video converters have several benefits.
- No Internet connection required;
- Provide rich functionality;
- Flexible adjustment;
- Possibility to process large files.
- No Ads.
- No watermark.
The best M4A to MP4 Converter offline - Wondershare UniConverter

Wondershare UniConverter is one of the most popular and best M4A to MP4 converter tools. It's a complete video toolbox to convert, compress, edit videos, burn DVDs, and much more. In addition converting M4A to MP4 at 90x faster can also make more than 1,000 other music and video file format conversions. It comes with a plethora of functionality and a visually appealing and user-friendly interface.

Wondershare UniConverter — All-in-one video solution for Mac and Windows.

Convert any audio file to videos easily and quickly.
90X faster to convert video or audio files.
Support more than 1,000 video, image and audio formats.
Compress your video, audio and image files without quality loss.
Save any online video or music from more than 10,000 platforms and sites.
AI-powered features such as Smart Trimmer, AI Portrait, Background Remover take your video to the next level.
The complete video toolbox to convert, compress, edit videos, burn DVDs and much more.
Follow these simple steps to convert M4A to MP4 using Wondershare UniConverter:
Step 1 Launch Wondershare UniConverter and import M4A file(s).
Select the Converter tab from the Wondershare UniConverter navigation panel on the left. Now click the +Add Files button to open a new window. Locate the M4A files on your PC and import them.

Step 2 Choose the M4A as the output format.
Select the Output Format from the drop-down at the bottom of the window and choose the MP4 format under the Video section.

Step 3 Convert and save the MP4 files.
Hit on the Start All button to convert the M4A to MP4.

Try Wondershare UniConverter for free now!
Over 3,591,664 people have downloaded it to try the advanced features.
Part 3. Conclusion
So, that's it. We've covered the top 10 M4A to MP4 converters that don't require any additional software to be installed. They may look very similar, but each has its particular advantages. Wondershare UniConverter is the best among them. Because it provides both M4A to MP4 or MP4 to M4A conversion.