M4A (AAC inside an MP4 container) is the format Apple devices, iTunes, QuickTime, and most car infotainment systems expect. OGG support on those platforms is limited.

Does it support Opus inside OGG?

Yes — ffmpeg.wasm decodes both OGG Vorbis and OGG Opus and re-encodes to AAC.

Are my files uploaded?

No. Everything runs in your browser via ffmpeg.wasm. Nothing is sent to any server.

Does it work on mobile?

Yes. Works on Android Chrome and iOS Safari.

OGG to M4A Converter

Convert OGG Vorbis or Opus audio to M4A (AAC) for iPhone, iTunes, and QuickTime — runs locally via ffmpeg.wasm, nothing is uploaded.

100% client-side · no upload

OGG audio file (Vorbis or Opus)

Settings M4A (AAC) bitrate

Load a file to begin.

How to use

Pick your .ogg or .opus file using the file picker.
Choose an AAC bitrate (128 kbps is a good default).
Click Convert to M4A and download.

Related tools

MP4 to MP3 Converter
FLAC to MP3 Converter
WAV to MP3 Converter

More ways to use this tool

Convert OGG for Apple Music / iTunes
Convert Opus OGG to M4A Online

Frequently Asked Questions

Why M4A?: M4A (AAC inside an MP4 container) is the format Apple devices, iTunes, QuickTime, and most car infotainment systems expect. OGG support on those platforms is limited.
Does it support Opus inside OGG?: Yes — ffmpeg.wasm decodes both OGG Vorbis and OGG Opus and re-encodes to AAC.
Are my files uploaded?: No. Everything runs in your browser via ffmpeg.wasm. Nothing is sent to any server.
Does it work on mobile?: Yes. Works on Android Chrome and iOS Safari.

Last updated: 2026-05-20 By jarvisbox