AAC vs WMA: Which Should You Use?

Side-by-side comparison of AAC and WMA audio formats — features, pros, cons, and conversion options.

Quick Answer

AAC is best for Streaming and mobile audio playback. WMA is best for Windows Media Player and legacy Windows audio.

Quick Verdict

AAC Best for Streaming and mobile audio playback

✓ Excellent sound quality at low bitrates
✓ Wide device support
✓ Efficient compression
✗ Lossy compression

Convert AAC to WMA →

WMA Best for Windows Media Player and legacy Windows audio

✓ DRM support
✓ Good quality at low bitrates
✓ Windows integration
✗ Limited cross-platform support

Convert WMA to AAC →

Specs Comparison

Side-by-side technical comparison of AAC and WMA

Feature	AAC	WMA
Category	Audio	Audio
Year Introduced	1997	1999
MIME Type	audio/aac	audio/x-ms-wma
Extensions	.aac	.wma
Lossy	✓	✓
Codec	Advanced Audio Coding	Windows Media Audio
Max Bitrate	512 kbps	768 kbps
Max Sample Rate	96 kHz	96 kHz
Channels	7.1 surround	7.1 surround
Streaming	✓	✓

Pros & Cons

AAC

Pros

✓ Excellent sound quality at low bitrates
✓ Wide device support
✓ Efficient compression

Cons

✗ Lossy compression
✗ Not as universally supported as MP3
✗ Patent-encumbered

WMA

Pros

✓ DRM support
✓ Good quality at low bitrates
✓ Windows integration

Cons

✗ Limited cross-platform support
✗ Proprietary Microsoft format
✗ Declining usage

When to Use Each

Choose AAC when...

You need files optimized for Streaming and mobile audio playback
Excellent sound quality at low bitrates
Wide device support

Choose WMA when...

You need files optimized for Windows Media Player and legacy Windows audio
DRM support
Good quality at low bitrates

How to Convert

Convert between AAC and WMA for free on ChangeThisFile

Convert AAC to WMA Server-side conversion — auto-deleted after processing Convert WMA to AAC Server-side conversion — auto-deleted after processing

Frequently Asked Questions

What's the difference between AAC and WMA?

AAC is best for Streaming and mobile audio playback, while WMA is best for Windows Media Player and legacy Windows audio. Both are audio formats but they differ in compression, compatibility, and intended use cases.

Is AAC or WMA better for audio?

It depends on your use case. AAC is better for Streaming and mobile audio playback. WMA is better for Windows Media Player and legacy Windows audio. Consider your specific requirements when choosing between them.

How do I convert AAC to WMA?

Go to the AAC to WMA converter on ChangeThisFile. Upload your file and the conversion processes on the server, then auto-deletes. It's free with no signup required.

Can I convert WMA to AAC?

Yes. ChangeThisFile supports WMA to AAC conversion. Upload your file for server-side conversion — files are auto-deleted after processing.

Which is smaller, AAC or WMA?

File size depends on the content and compression settings. AAC uses lossy compression for smaller files. WMA uses lossy compression for smaller files. For the smallest files, choose the format with lossy compression that meets your quality needs.

Does AAC have the same features as WMA?

AAC and WMA share some features but differ in others. Check the feature comparison table above for a detailed side-by-side breakdown.

Is AAC or WMA free to use?

Both AAC and WMA are supported file formats that are free to use. You can convert between them for free on ChangeThisFile — server-side conversions are free with no signup required.

Which format is newer, AAC or WMA?

WMA is newer — it was introduced in 1999, while AAC dates back to 1997. Newer formats often offer better compression and features, but older formats tend to have wider compatibility.

Related Comparisons

Ready to convert?

Convert between AAC and WMA instantly — free, no signup required.

Start Converting