Convert Adaptive Multi-Rate Audio (.amr) to Apple Lossless Audio Codec (.alac) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .amr file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .m4a file when it's ready.
AMR is a speech-only codec standardized by 3GPP for mobile telephony, encoding at bit rates as low as 4.75 kbps. ALAC (Apple Lossless Audio Codec) is a lossless compression format developed by Apple, capable of reducing PCM audio to about 50-60% of its original size without losing a single sample. Converting AMR to ALAC gives you an Apple-native lossless file that is smaller than AIFF or WAV while remaining perfectly reconstructible.
If you want an uncompressed-equivalent archive of a voice recording that plays seamlessly in Apple Music, iTunes, and all iOS/macOS apps, ALAC is the best choice. Unlike AAC, ALAC is mathematically lossless — you can decode it back to the exact PCM stream that came out of the AMR decoder. It is also smaller than AIFF/WAV, making it practical for archiving large collections of call recordings on Apple hardware.
FFmpeg first decodes the AMR stream to PCM (8 kHz mono for AMR-NB, 16 kHz for AMR-WB), then compresses it with the ALAC encoder and wraps the result in an M4A container. ALAC compression on low-bandwidth speech data typically achieves 30-40% size reduction compared to raw PCM, though the file will still be much larger than the compressed AMR original.
ALAC is lossless — every sample decoded from the AMR source is perfectly preserved. The quality ceiling is determined by the AMR codec's original capture: 8 kHz narrow-band or 16 kHz wide-band. No additional artifacts are introduced.
| Device | AMR | ALAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AMR to ALAC is the right conversion when you need bit-perfect archiving of voice recordings in the Apple ecosystem.
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| No |
| Jellemzo | AMR | ALAC |
|---|---|---|
| Teljes nev | Adaptive Multi-Rate Audio | Apple Lossless Audio Codec |
| Kiterjesztes | .amr | .m4a |
| Leginkabb ajanlott | Speech optimized | Lossless |