AAC vs AIFF: Which Should You Use?
Side-by-side comparison of AAC and AIFF audio formats — features, pros, cons, and conversion options.
AAC is best for Streaming and mobile audio playback. AIFF is best for Professional audio production on macOS.
Quick Verdict
- ✓ Excellent sound quality at low bitrates
- ✓ Wide device support
- ✓ Efficient compression
- ✗ Lossy compression
- ✓ Lossless audio quality
- ✓ Metadata support
- ✓ Professional studio standard on Mac
- ✗ Very large file size
Specs Comparison
Side-by-side technical comparison of AAC and AIFF
| Feature | AAC | AIFF |
|---|---|---|
| Category | Audio | Audio |
| Year Introduced | 1997 | 1988 |
| MIME Type | audio/aac | audio/aiff |
| Extensions | .aac | .aiff, .aif |
| Lossy | ✓ | ✗ |
| Codec | Advanced Audio Coding | PCM (uncompressed) |
| Max Bitrate | 512 kbps | unlimited (lossless) |
| Max Sample Rate | 96 kHz | 48 kHz |
| Channels | 7.1 surround | Stereo |
| Streaming | ✓ | ✗ |
Pros & Cons
AAC
- ✓ Excellent sound quality at low bitrates
- ✓ Wide device support
- ✓ Efficient compression
- ✗ Lossy compression
- ✗ Not as universally supported as MP3
- ✗ Patent-encumbered
AIFF
- ✓ Lossless audio quality
- ✓ Metadata support
- ✓ Professional studio standard on Mac
- ✗ Very large file size
- ✗ Limited streaming support
- ✗ Less cross-platform than WAV
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 AIFF when...
- You need files optimized for Professional audio production on macOS
- Lossless audio quality
- Metadata support
How to Convert
Convert between AAC and AIFF for free on ChangeThisFile
Frequently Asked Questions
AAC is best for Streaming and mobile audio playback, while AIFF is best for Professional audio production on macOS. Both are audio formats but they differ in compression, compatibility, and intended use cases.
It depends on your use case. AAC is better for Streaming and mobile audio playback. AIFF is better for Professional audio production on macOS. Consider your specific requirements when choosing between them.
Go to the AAC to AIFF converter on ChangeThisFile. Upload your file and the conversion processes on the server, then auto-deletes. It's free with no signup required.
Yes. ChangeThisFile supports AIFF to AAC conversion. Upload your file for server-side conversion — files are auto-deleted after processing.
File size depends on the content and compression settings. AAC uses lossy compression for smaller files. AIFF preserves full quality. For the smallest files, choose the format with lossy compression that meets your quality needs.
Yes, AAC supports lossy, but AIFF does not. This may be important depending on your use case.
Both AAC and AIFF 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.
AAC is newer — it was introduced in 1997, while AIFF dates back to 1988. Newer formats often offer better compression and features, but older formats tend to have wider compatibility.
Related Comparisons
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