Overview
This guide compares AAC and MP3 across the most important criteria to help you choose the right format for your needs.
AAC provides better audio quality than MP3 at the same bit rate, especially below 256kbps.
Head-to-Head Comparison
Audio Quality
AAC: AAC provides better quality than MP3 at the same bit rate.
MP3: MP3 is slightly inferior to AAC at equivalent bit rates.
Winner: AAC
Compatibility
AAC: AAC is supported by Apple devices natively; moderate Android support.
MP3: MP3 is supported by literally every device and application.
Winner: MP3
Streaming
AAC: Apple Music, YouTube, and most platforms use AAC for streaming.
MP3: MP3 is widely used for podcast distribution.
Winner: Tie
Low Bit Rate
AAC: AAC significantly outperforms MP3 at bit rates below 128kbps.
MP3: MP3 at low bit rates sounds notably worse than AAC.
Winner: AAC
File Size
AAC: AAC and MP3 achieve similar file sizes at equivalent bit rates.
MP3: Similar file sizes to AAC at the same bit rate.
Winner: Tie
Convert Between AAC and MP3
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Convert Files NowFrequently Asked Questions
Is AAC better than MP3?
AAC generally provides better audio quality than MP3 at the same bit rate. The difference is most noticeable at lower bit rates (below 192kbps).
Which do streaming services use?
Apple Music and YouTube use AAC. Spotify uses OGG Vorbis. Most podcast platforms accept both MP3 and AAC.
Does Android support AAC?
Yes, Android supports AAC natively. However, some older Android devices may have limited AAC support.
What is the best format for podcasts?
MP3 has the broadest podcast player compatibility. AAC is an excellent alternative with better quality.
Can I tell the difference between 256kbps AAC and MP3?
At 256kbps, most people cannot reliably distinguish AAC from MP3 in blind tests.