Bulk AAC to AMR Converter Online — Free HD Quality
Drag and drop your multiple AAC files into this free online AAC to AMR converter (.aac 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 — your original AAC files are removed from our servers right after.
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PNG, JPG, WebP, GIF, HEIC, RAW, PSD, SVG and more
Max 100MB per file
AAC vs AMR — File Format Comparison
| Feature | AAC | AMR |
|---|---|---|
| File Extension | .aac | .amr |
| MIME Type | audio/aac | audio/amr |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | No |
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
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
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