Bulk AC3 to AMR Converter Online — Free HD Quality
Drag and drop your multiple AC3 files into this free online AC3 to AMR converter (.ac3 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 AC3 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
AC3 vs AMR — File Format Comparison
| Feature | AC3 | AMR |
|---|---|---|
| File Extension | .ac3 | .amr |
| MIME Type | audio/ac3 | audio/amr |
| Compression Type | Lossy | Lossy |
| Metadata Support | No | No |
What Is AC3 Format?
Dolby Digital AC-3 — Dolby's multi-channel surround sound codec used in DVD, Blu-ray, and broadcast television; commonly encountered when extracting audio tracks from home theatre content.
- Compression: Lossy
- Tags & Metadata: Not 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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