Convert MP3 to AAC
Free, fast and secure — convert MP3 to AAC right in your browser.
Upgrade your MP3 to a modern AAC
Converting MP3 to AAC adopts a modern, highly efficient format that keeps quality high while cutting file size — a smart default for today’s web and apps.
How to convert MP3 to AAC
- 1 Drop your MP3 file into the converter above.
- 2 It is converted to AAC automatically — no settings to fiddle with.
- 3 Download your new AAC file instantly.
MP3 vs AAC
| Feature | MP3 | AAC |
|---|---|---|
| Compression | Lossy | Lossy |
| MIME type | audio/mpeg | audio/aac |
| Best for | Music, podcasts and voice that need to play everywhere at a small size. | Streaming and modern playback where quality-per-byte beats raw compatibility. |
About the formats
MP3 audio
MP3 is the world’s most compatible audio format. Its lossy compression makes small files that play on every device and app, which is why it is still the default for music and podcasts.
Strengths
- Plays on virtually everything
- Small, convenient files
- Adjustable bitrate
Limitations
- Lossy — discards some audio detail
- Not ideal for archiving
- No lossless option
Best for: Music, podcasts and voice that need to play everywhere at a small size.
AAC audio
AAC is the successor to MP3, offering better sound at the same bitrate. It is the standard for streaming services, YouTube and Apple devices.
Strengths
- Better quality than MP3 at equal size
- Standard for streaming platforms
- Wide modern-device support
Limitations
- Lossy compression
- Slightly less universal than MP3
- No lossless mode
Best for: Streaming and modern playback where quality-per-byte beats raw compatibility.