Convert WMA to M4A — Free Online Converter

WMA is Microsoft's proprietary audio format, once the default for Windows Media Player and Zune. M4A (MPEG-4 Audio) is Apple's audio container based on the ISO base media file format, typically holding AAC-encoded audio. M4A is the native format for iTunes, Apple Music, iPhone Voice Memos, and the entire Apple ecosystem.

Converting WMA to M4A moves your audio from a Windows-centric format to the universally supported Apple standard. M4A/AAC provides better audio quality than WMA Standard at equivalent bitrates and enjoys native playback on virtually every modern device.

WMA playback on Apple devices requires third-party apps — neither iTunes, Apple Music, nor the native iOS Music app support WMA natively. M4A is the native format that plays everywhere in the Apple ecosystem with hardware-accelerated decoding. Converting WMA to M4A/AAC also typically improves audio quality at the same file size.

M4A's container supports richer metadata than WMA's ASF format, including embedded album art, lyrics, chapter markers, and iTunes-specific tags like media kind, grouping, and show/episode information. For anyone building a well-organized music or podcast library, M4A is the superior container.