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1. Convert AAC to Other Formats +
  1. 1.1 Convert MP4 to AAC
  2. 1.3 Convert AAC Files
2. Convert Other Formats to AAC +
  1. 2.1 Convert AAC to M4R
  2. 2.2 Convert AAC to MP4
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How to Convert AAC to MP4 Free and Online Without Quality Loss

by Christine Smith • 2024-01-11 10:28:11 • Proven solutions

Though AAC is a popular format, there might be a few devices and players that might not support playing the file, and in such situations, the need to convert the file to a more compatible format as MP4 arises. To help you convert your AAC files in the lossless quality, we have selected the best AAC to MP4 conversion tools as below.

Part 1. The best way to convert AAC to MP4 recommended

When you do not want to compromise on the quality of the files during the conversion process and to look for the best tool, we recommend Wondershare UniConverter. This is a versatile program that can work on all the latest Windows and Mac systems seamlessly. Audio, video and other files in almost all formats can be quickly converted using this tool, supporting more than 1000 formats. Batch convert in high speed and also customize the files using Wondershare UniConverter. Not only local, but the files on the devices can also be directly added to the interface for the process.

  • Allows lossless quality conversion in more than 1000 formats
  • Batch processing support at a super-fast speed.
  • Built-in editor to trim, crop, cut, add effects, and add watermark to the files.
  • Video recording, compression, transfer, and other additional features are supported.
  • Supported OS: Windows 10/8/7/XP/Vista, macOS 11 Big Sur, 10.15 (Catalina), 10.14, 10.13, 10.12, 10.11, 10.10, 10.9, 10.8, 10.7.

Steps to convert AAC to MP4 using Wondershare UniConverter:

Step 1 Install Wondershare and add AAC files.

Open the Wondershare AAC to MP4 converter and choose the Converter tab. Add AAC files by clicking on the add files icon or the + sign. You can even drag and drop the files.

add AAC files to UniConverter

Step 2 Select MP4 as the output format.

Expand the drop-down menu at the Output Format and select MP4 from the Video list. Keep the quality as the source file or select from the available options.

Select MP4 as the output format

Step 3 Convert AAC to MP4.

Clicking on Start All will start processing and converting all the added files. The Finished tab on the interface has all the converted files on the software, while the folder at the File Location stores them on the desktop.

Convert AAC to MP4

Part 3. A free AAC to MP4 converter you can try

Online tools are internet dependent, do not support batch process, and has other limitations. So, to avoid these limitations at a pocket-friendly option, free software is available. Wondershare, too, has its free tool called Free Video Converter that can work on most of the Windows and Mac systems and allows conversion in more than 1000 formats and devices. The converted files come with a watermark, and the software also has ads. Additional features include batch processing, editing, file customization, and more.

Steps to convert AAC to MP4 using Wondershare Free Video Converter

Step 1: Download, install, and open the Wondershare Free Video Converter on your system. At the Convert tab, click on the + Add Files button to load the AAC files to be converted.

Add .aac files

Step 2 Expand the menu at the Convert all files to: tab and select MP4 from the Video list. Also, select the file quality.

Choose MP4 from the video list

Step 3 At the Output tab, select the folder on your computer where you want to save the converted files. Finally, click on the Convert All button. At the Converted tab, you can find the processed files.

Convert AAC to MP4

Part 4. Other 3 ways to convert AAC audio files to MP4 online

A few more popular online tools for converting AAC files to MP4 are enlisted below.

1. Zamzar

Your AAC files up to 50MB from the computer or using a link can be added to this online tool for conversion to MP4 and an array of other supported formats. The interface is simple, where you just need to add the files and choose the target format. After the file is converted, you can download them from the interface or can get them on an email.



  • Local and online files can be added.
  • Get converted file on email.
  • It supports a wide range of formats.


  • Cloud storage files cannot be added.
  • The maximum file size limit is 50MB.

2. AnyConv

For a simple conversion of key file formats, this is a good tool to consider. Files can be browsed and added or can be dragged to the interface. With a simple interface, the tool is apt even for beginners. The converted files can be saved.



  • It is a free tool with a simple interface.
  • Drag and drop the files.
  • No software installation is needed.


  • No option for file editing
  • No option to add online and cloud files

3. Online Convert Free

To convert AAC to MP4 online in a simple and quick manner, use this tool that works from the browser. At a time, two files can be converted, and after the process, they can be saved to your local system.

Online Convert Free


  • Browse and add the files or drag them to the program.
  • It is a free online tool with a simple interface.


  • Only two files at a time can be converted.
  • Online and cloud storage files cannot be added.
  • It has limited format support.


Converting your AAC files to MP4 can be done using any one of the above tools, depending on your requirements. Wondershare UniConverter is a versatile program apt for quality conversion with support to additional features.

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Christine Smith

Christine Smith

chief Editor

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