Format comparison
AAC vs WMA
How do AAC and WMAcompare? Here's everything you need to know to choose the right format — and how to convert between them.
.aac
Full guide →Advanced Audio Coding
AAC is the successor to MP3, offering better sound quality at lower bitrates. It's the default audio format for Apple Music, YouTube, and most streaming platforms.
.wma
Full guide →Windows Media Audio
WMA is Microsoft's proprietary audio format. While it offered competitive quality in the early 2000s, it has largely been superseded by AAC and other formats. It's still encountered in legacy Windows media libraries.
| Specification | AAC | WMA |
|---|---|---|
| Full name | Advanced Audio Coding | Windows Media Audio |
| Extension | .aac | .wma |
| MIME type | audio/aac | audio/x-ms-wma |
| Category | Audio | Audio |
| Developer | ISO / Fraunhofer / Dolby / Sony / Nokia | Microsoft |
| Year introduced | 1997 | 1999 |
| Compression | Lossy | Lossy |
AAC advantages
- Better quality than MP3 at same bitrate
- Default format for iTunes and Apple Music
- Widely used in streaming
- Supports up to 48 channels
AAC limitations
- Patent-encumbered
- Slightly less universal than MP3
- Encoding quality varies by implementation
- DRM can restrict usage
WMA advantages
- Good compression at low bitrates
- DRM support for content protection
- Native Windows support
- Lossless mode available
WMA limitations
- Limited cross-platform support
- Proprietary format
- Declining popularity
- Not supported on many portable devices
Which should you use?
Both are excellent audio formats. AAC is preferred for apple music and itunes, while WMA shines at legacy windows media libraries.
Best uses for AAC
Apple Music and iTunes
YouTube and streaming platforms
Mobile music playback
Digital broadcasting (DAB+)
Best uses for WMA
Legacy Windows media libraries
Windows-based audio systems
DRM-protected content
Older portable devices
Convert between AAC and WMA
Need to switch formats? Convert for free with SquishConvert.