Bulk AMR to M4A Converter Online — Free HD Quality
Drag and drop your multiple AMR files into this 100% free online AMR to M4A converter (.amr to .m4a), and click the Convert button to bulk convert them to M4A format in HD quality. Use the quality slider to fine-tune your M4A output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original AMR files are removed from our servers right after. Also see:MP3 to FLAC conversion tool online.
Drop your AMR files here to convert to M4A, or click to browse
Converts .amr to M4A (.m4a) in HD quality — bulk, free, no signup
Choose FilesAMR vs M4A — File Format Comparison
See how AMR and M4A compare across file extension, MIME type, compression, and feature support. Related:Convert AC3 to WAV free.
| Feature | AMR | M4A |
|---|---|---|
| File Extension | .amr | .m4a |
| MIME Type | audio/amr | audio/mp4 |
| Compression Type | Lossy | Lossy |
| Metadata Support | No | Yes |
What Is AMR Format?
Adaptive Multi-Rate — the standard voice codec for GSM and UMTS mobile networks, used in phone call recordings and voice messages; delivers compact files optimised for speech at 8 kHz. See also:Bulk WMA to M4A tool.
- Compression: Lossy
- Tags & Metadata: Not supported
What Is M4A Format?
MPEG-4 Audio — AAC audio in an MP4 container, the standard format for Apple Music, iTunes purchases, and iPhone voice memos, offering better quality than MP3 at equivalent bitrates. You might also need:Get OGA from PCM.
- Compression: Lossy
- Tags & Metadata: Supported