How to convert AMR to M4A
- Add your .AMR file - drop it in the box above or click to browse.
- Convert it to .M4A in a few seconds.
- Download your new .M4A file.
What to expect
- AMR is a lossy codec recorded at very low bitrates (4.75-12.2 kbps); converting to M4A preserves what was captured but cannot recover discarded audio data.
- AMR-NB files are sampled at 8 kHz - the same narrow bandwidth as a phone call - so the output will sound voice-only regardless of which converter is used.
- Files with a
.3gaor.3gpextension often contain AMR audio and convert to M4A the same way as a plain.amrfile.
Frequently asked questions
Does converting AMR to M4A improve audio quality?
No - AMR permanently discards audio data at the time of recording, and re-encoding to AAC cannot restore it. The M4A will sound identical to the original AMR.
Why does my converted M4A still sound like a telephone call?
AMR-NB records at 8 kHz, the same narrow frequency range as a phone call. That sound is a property of the source recording, not the conversion.
Will the M4A file be bigger than the original AMR?
Yes - AMR compresses speech at 4.75-12.2 kbps, while typical AAC output runs 64-128 kbps, so the M4A will be several times larger even at a modest bitrate.
Can I open AMR files directly on a Mac or iPhone?
QuickTime and the iOS Files app do not support AMR, so converting to M4A first is the simplest way to play the audio on Apple devices.
