Convert WebM to M4A — Free Online Converter
Convert WebM Video (.webm) to MPEG-4 Audio (.m4a) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
About WebM to M4A Conversion
WebM files contain Opus or Vorbis audio — open-source codecs with excellent quality. M4A is Apple's audio-only MPEG-4 container, holding AAC or ALAC audio. M4A is the native format for Apple Music, iTunes, iPhone Voice Memos, and the entire Apple ecosystem, supporting rich metadata including album art, lyrics, and chapter markers.
Why Convert WebM to M4A?
M4A integrates seamlessly with every Apple device and service. While Opus is technically superior to AAC, the iPhone's Music app cannot play Opus natively, and Apple Music does not accept Opus imports. M4A with AAC provides the closest quality match to Opus in Apple's native format.
For YouTube audio downloads (served as Opus in WebM), converting to M4A produces files that integrate perfectly into Apple Music libraries.
Common Use Cases
- Converting YouTube audio downloads for Apple Music library integration
- Creating iPhone-compatible audio from WebM podcast recordings