Bulk WMA to AMR Converter Online — Free HD Quality
Drag and drop your multiple WMA files into this free online WMA to AMR converter (.wma 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 WMA 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
WMA vs AMR — File Format Comparison
| Feature | WMA | AMR |
|---|---|---|
| File Extension | .wma | .amr |
| MIME Type | audio/x-ms-wma | audio/amr |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | No |
What Is WMA Format?
Windows Media Audio — Microsoft's proprietary lossy audio codec bundled with Windows Media Player, commonly found in legacy Windows media libraries and early-2000s digital music stores.
- 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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