Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.AAC
File Type
Advanced Audio Coding
Category
Audio
Best first step
Use compatible software
Quick Summary
A practical overview of the .aac file format
Advanced Audio Coding (AAC) is a standardized, lossy audio compression and encoding scheme for digital audio. Designed to be the successor to MP3, AAC generally achieves better sound quality than MP3 at similar bit rates. It is widely used as the default audio format for YouTube, iOS devices, Andro…
File extension
.AAC
File type
Advanced Audio Coding
Category
Audio
Recommended action
Open with a trusted compatible app
How to open a .aac file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .aac.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .aac file?
File extension details and usage information
Advanced Audio Coding (AAC) is a standardized, lossy audio compression and encoding scheme for digital audio. Designed to be the successor to MP3, AAC generally achieves better sound quality than MP3 at similar bit rates. It is widely used as the default audio format for YouTube, iOS devices, Android, Nintendo platforms, and PlayStation. AAC is part of the MPEG-4 standard (ISO/IEC 14496-3) and is also specified in ISO/IEC 13818-7 (MPEG-2 Part 7). AAC supports a wide range of sample rates and bit rates, allowing for flexibility in balancing audio quality and file size. Different profiles of AAC exist, such as AAC-LC (Low Complexity), AAC-HE (High-Efficiency), and AAC-LD (Low Delay), each optimized for different applications. AAC-LC is the most common profile, while AAC-HE is designed for low bit rate streaming. AAC-LD is used in applications requiring minimal delay, such as teleconferencing. The file extension '.aac' is commonly used to denote raw AAC audio streams, but AAC audio is often embedded within container formats like MP4 (.mp4, .m4a) and 3GP (.3gp).
Software Compatibility
Programs that may open or work with .aac files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .aac files be converted?
Options for saving or exporting this file to another format
In many cases, a .aac file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .aac file.
Why can't I open a .aac file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .aac format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .aac files
To open a .aac file, use software that supports this file format.
- VLC Media Player
- iTunes
- Windows Media Player
- foobar2000
- Media Player Classic
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .aac file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.