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.m4a.opus
Convert M4A (AAC) to Opus
Convert M4A (AAC) (.m4a) to Opus (.opus) for free, right in your browser. No upload, no sign-up: your files never leave your device.
About M4A (AAC) to Opus conversion
This tool converts M4A (AAC) files to Opus entirely on your device. The conversion runs locally in your browser using WebAssembly, so your audio files are never uploaded to a server.
M4A is AAC audio in an MP4 container, the standard format for iTunes and Apple devices.
Opus is a modern open audio codec that sounds great at low bitrates, used for voice and streaming.