Bulk M4A to AMR Converter Online — Free HD Quality
Drag and drop your multiple M4A files into this 100% free online M4A to AMR converter (.m4a to .amr), and click the Convert button to bulk convert them to AMR format in HD quality. Use the quality slider to fine-tune your AMR output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original M4A files are removed from our servers right after. Also see:Online WAV to OGG converter tool.
Drop your M4A files here to convert to AMR, or click to browse
Converts .m4a to AMR (.amr) in HD quality — bulk, free, no signup
Choose FilesM4A vs AMR — File Format Comparison
See how M4A and AMR compare across file extension, MIME type, compression, and feature support. Related:How to convert M4A to WMA?.
| Feature | M4A | AMR |
|---|---|---|
| File Extension | .m4a | .amr |
| MIME Type | audio/mp4 | audio/amr |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | No |
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. See also:Make OGA files into WMA.
- Compression: Lossy
- Tags & Metadata: Supported
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.
- Compression: Lossy
- Tags & Metadata: Not supported