M4A to OGG Converter
Convert M4A to OGG free — no upload, no signup
To convert M4A to OGG, drop your M4A audio files into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. Convert M4A to open Ogg Vorbis.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Advanced
How to convert M4A to OGG
Add your M4A files
Drag and drop M4A files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Pick a bitrate
192 kbps suits music and 128 kbps or less suits speech. Sample rate and mono/stereo are under Advanced.
Convert and download
Click Convert, then download each OGG file or all of them as one ZIP.
Why convert M4A to OGG?
Games, Linux apps and some Android tools prefer OGG.
What happens when you convert M4A to OGG?
The AAC is re-encoded to Vorbis at 192 kbps.
How does Fylo convert M4A to OGG?
Fylo decodes the AAC (or ALAC) audio in the M4A with ffmpeg compiled to WebAssembly and encodes it with the Vorbis encoder (libvorbis) at 192 kbps in an Ogg container. Both formats are lossy, so each conversion discards a little detail — start from the highest-bitrate M4A you have. A 3-minute song is ≈ 3.6 MB at 160 kbps as M4A and ≈ 3.6 MB at 160 kbps as OGG. The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between M4A and OGG?
M4A is an MPEG-4 container that holds only audio — usually AAC, or Apple Lossless (ALAC). Apple popularised the extension with the iTunes Store in 2003; iPhone Voice Memos and many podcasts also use it. Audiobooks often use the related .m4b extension.
Ogg is an open container from the Xiph.Org Foundation; Vorbis, the audio codec most .ogg files use, reached version 1.0 in 2002. Vorbis was created as a free, unpatented alternative to MP3 and sounds better at the same bitrate.
Learn more: M4A format guide · OGG format guide
| Property | M4A | OGG |
|---|---|---|
| Compression | Lossy (AAC) or lossless (ALAC) | Lossy (Vorbis) |
| Typical bitrate | 128–256 kbps | 96–320 kbps |
| 3-minute song | ≈ 3.6 MB at 160 kbps | ≈ 3.6 MB at 160 kbps |
| Tags and cover art | Yes (full, with cover art) | Yes (Vorbis comments) |
| Compatibility | Apple devices, Android, Windows 10+, browsers | Android, Chrome, Firefox, games; limited on Apple |
| Best for | iTunes/Apple Music libraries, voice memos, audiobooks | Games, open-source projects, web audio |
| Introduced | 2003 | 2002 |
Frequently asked questions
Is quality kept?
Nearly — it's a lossy-to-lossy conversion at a generous bitrate.
Will iPhones play OGG?
Not in most apps.
Is my M4A file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your M4A file is read directly from your device and never sent anywhere.
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