Convert Apple Lossless Audio Codec (.alac) to Windows Media Audio (.wma) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .m4a file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .wma file when it's ready.
ALAC is Apple's lossless audio codec in M4A containers. WMA (Windows Media Audio) is Microsoft's codec family — WMA Standard (lossy), WMA Pro (multichannel), and WMA Lossless (bit-perfect). Converting ALAC to WMA bridges Apple's lossless ecosystem with the Windows Media world.
For WMA Standard output, this is a lossless-to-lossy conversion that leverages ALAC's perfect source quality. For WMA Lossless output, it is a lossless-to-lossless transfer between ecosystems with zero quality compromise.
Windows Media Player and Windows-based corporate environments may require WMA format. Converting ALAC to WMA enables playback in these Windows-centric systems. For WMA Lossless, the conversion provides bit-perfect audio in Microsoft's native lossless format.
If you are migrating from an Apple to Windows ecosystem and want to maintain lossless quality, WMA Lossless is the Microsoft equivalent of ALAC. Both are lossless codecs with similar compression ratios.
FFmpeg decodes ALAC to PCM and encodes using wmav2 (WMA Standard) or WMA Lossless into an ASF container. The lossless ALAC decode provides perfect PCM for optimal WMA encoding. For WMA Standard, quality depends on bitrate. For WMA Lossless, the output is bit-perfect. M4A metadata is mapped to ASF attributes.
WMA Standard at 128-192 kbps produces good quality from the lossless ALAC source. WMA Lossless preserves every sample exactly — a perfect lossless-to-lossless transfer. WMA Standard is slightly less efficient than AAC at equivalent bitrates.
| Device | ALAC | WMA |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
ALAC to WMA bridges Apple and Microsoft lossless ecosystems. Use WMA Lossless for perfect quality or WMA Standard for compact files.
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| No |
| Egenskap | ALAC | WMA |
|---|---|---|
| Fullt navn | Apple Lossless Audio Codec | Windows Media Audio |
| Filendelse | .m4a | .wma |
| Best egnet for | Lossless | Windows native |