AAC to MP3 Converter
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Frequently asked questions
What is AAC?
AAC is the codec behind the audio of most MP4 videos, iPhone recordings and Apple Music. A .aac file is a bare AAC stream with no container; not every player or car stereo opens it, while MP3 works everywhere.
Can I avoid re-encoding?
Yes, if M4A works for you: pick it in the format menu and the AAC stream is moved into an M4A container as is, with no loss. iPhones, Android and most players understand it.
Which bitrate should I pick?
192 kbps is a good choice for music and matches what streaming services use. 320 kbps is the maximum for MP3: slightly better quality, bigger file. For speech, podcasts and lectures, 128 kbps is plenty.
Will I lose quality?
Both AAC and MP3 are lossy, so converting costs a little quality. To keep the loss unnoticeable, choose a bitrate no lower than the original's.
How many files can I convert at once?
Up to 100 files per batch. Download them one by one or all together in a single ZIP file.
Is it safe?
Yes. Only the converter itself is loaded from the site; your recordings are processed in your browser and never sent to a server.