Convert AMR to AAC — Free Online Converter

AMR files are produced by phone networks for voice calls and voicemails, encoding speech at extremely low bit rates (4.75-12.2 kbps for AMR-NB). AAC (Advanced Audio Coding) is the successor to MP3 and the default audio codec on Apple devices, streaming services, and YouTube. Converting AMR to AAC elevates a narrow-band telephony recording into a format understood by every modern device and platform.

AMR files sound tinny and lack support outside of dedicated voice-recording apps. AAC provides dramatically better codec efficiency — even at 64 kbps, AAC delivers clearer output than AMR at its maximum 12.2 kbps. More importantly, AAC is universally supported: iPhones, Android phones, web browsers, Windows Media Player, and macOS all play AAC natively. Converting also lets you embed the audio in podcasts, presentations, and web pages where AMR would be rejected.