Bulk AMR to AAC Converter Online — Free HD Quality
Drag and drop your multiple AMR files into this 100% free online AMR to AAC converter (.amr to .aac), and click the Convert button to bulk convert them to AAC format in HD quality. Use the quality slider to fine-tune your AAC 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:Convert FLAC files in bulk to ALAC.
Drop your AMR files here to convert to AAC, or click to browse
Converts .amr to AAC (.aac) in HD quality — bulk, free, no signup
Choose FilesAMR vs AAC — File Format Comparison
See how AMR and AAC compare across file extension, MIME type, compression, and feature support. Related:AC3 to FLAC conversion.
| Feature | AMR | AAC |
|---|---|---|
| File Extension | .amr | .aac |
| MIME Type | audio/amr | audio/aac |
| 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:Get OGG from CAF.
- Compression: Lossy
- Tags & Metadata: Not supported
What Is AAC Format?
Advanced Audio Coding — the successor to MP3 adopted by Apple, YouTube, and mobile platforms; delivers better quality than MP3 at the same bitrate, especially below 128 kbps.
- Compression: Lossy
- Tags & Metadata: Supported