Bulk CAF to AMR Converter Online — Free HD Quality
Drag and drop your multiple CAF files into this free online CAF to AMR converter (.caf 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 CAF 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
CAF vs AMR — File Format Comparison
| Feature | CAF | AMR |
|---|---|---|
| File Extension | .caf | .amr |
| MIME Type | audio/x-caf | audio/amr |
| Compression Type | Lossless | Lossy |
| Metadata Support | Yes | No |
What Is CAF Format?
Core Audio Format — Apple's flexible container for macOS and iOS supporting any codec (AAC, ALAC, PCM, MP3) with no file-size limit, used internally by Xcode, Logic Pro, and macOS system sounds.
- Compression: Lossless
- 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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