Bulk AMR to CAF Converter Online — Free HD Quality
Drag and drop your multiple AMR files into this free online AMR to CAF converter (.amr to .caf), and click the Convert button to bulk convert them to CAF format in HD quality. Use the quality slider to fine-tune your CAF output, then download your converted files one by one or as a single ZIP — your original AMR files are removed from our servers right after.
Drop images here or click to browse
PNG, JPG, WebP, GIF, HEIC, RAW, PSD, SVG and more
Max 100MB per file
AMR vs CAF — File Format Comparison
| Feature | AMR | CAF |
|---|---|---|
| File Extension | .amr | .caf |
| MIME Type | audio/amr | audio/x-caf |
| Compression Type | Lossy | Lossless |
| 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.
- Compression: Lossy
- Tags & Metadata: Not supported
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
Related Converters
- Free AAC to MP3 - no account needed
- Convert AC3 files in bulk to AVIF
- Convert AIFC files in bulk to M4R
- Simple AMR to M4A tool
- Quick EMF to PCX online converter
- Convert FITS files to RAS in queue
- Convert FITS files in bulk to WebP
- How to convert FLAC to OPUS?
- M4A to iPod Audio converter
- Change MID files to XPM
- Best OGA to AIF converter online
- Convert PICT files to PBM in queue
- Change PSB to PNG
- Make SVG files into JXL
- See all AMR conversions
- Convert other formats to CAF
- All Audio format converters
- Explore all free converters