Convert WMA to ALAC — Free Online Converter

WMA is Microsoft's proprietary audio codec family — WMA Standard for lossy compression, WMA Pro for multichannel, and WMA Lossless for bit-perfect audio. ALAC (Apple Lossless Audio Codec), open-sourced by Apple in 2011, provides lossless compression within the M4A container and plays natively on every Apple device. ALAC typically achieves 40-60% compression compared to raw PCM.

Converting WMA to ALAC decodes the WMA audio to PCM and re-encodes it losslessly with ALAC. For WMA Standard sources, this preserves the decoded quality in a lossless container suitable for the Apple ecosystem. For WMA Lossless sources, the conversion produces a true lossless-to-lossless transfer.

If you are migrating from a Windows-based music library to Apple devices, ALAC is the ideal target format. Unlike FLAC, ALAC plays natively on iPhone, iPad, Mac, Apple Watch, HomePod, and AirPods Max with hardware-accelerated decoding. Apple Music uses ALAC for its Lossless tier. The M4A container supports rich metadata including album art, lyrics, and chapter markers.

For WMA Lossless collections specifically, converting to ALAC preserves bit-perfect quality while gaining Apple ecosystem compatibility. Both codecs are lossless, so no quality is lost in the transfer. The resulting files play everywhere Apple hardware is used.