OGG to AAC Converter
Convert OGG to AAC free — no upload, no signup
To convert OGG to AAC, drop your OGG 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 OGG to raw AAC.
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 OGG to AAC
Add your OGG files
Drag and drop OGG 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 AAC file or all of them as one ZIP.
Why convert OGG to AAC?
Some streaming tools accept AAC but not Vorbis.
What happens when you convert OGG to AAC?
The Vorbis audio is re-encoded to AAC at 160 kbps.
How does Fylo convert OGG to AAC?
Fylo decodes the Vorbis audio in the OGG with ffmpeg compiled to WebAssembly and encodes it with FFmpeg's AAC encoder at 160 kbps, written as a raw ADTS stream. Both formats are lossy, so each conversion discards a little detail — start from the highest-bitrate OGG you have. A 3-minute song is ≈ 3.6 MB at 160 kbps as OGG and ≈ 3.6 MB at 160 kbps as AAC. The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between OGG and AAC?
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.
AAC (Advanced Audio Coding) was standardised in 1997 as part of MPEG-2 and later MPEG-4, designed to replace MP3. It achieves better quality at the same bitrate, especially below 128 kbps. A .aac file is usually a raw ADTS stream; the same audio inside an MP4 container is called M4A.
Learn more: OGG format guide · AAC format guide
| Property | OGG | AAC |
|---|---|---|
| Compression | Lossy (Vorbis) | Lossy |
| Typical bitrate | 96–320 kbps | 96–256 kbps |
| 3-minute song | ≈ 3.6 MB at 160 kbps | ≈ 3.6 MB at 160 kbps |
| Tags and cover art | Yes (Vorbis comments) | Limited in raw .aac (full in M4A) |
| Compatibility | Android, Chrome, Firefox, games; limited on Apple | Very wide: Apple, Android, YouTube, browsers |
| Best for | Games, open-source projects, web audio | Efficient music and video soundtracks |
| Introduced | 2002 | 1997 |
Frequently asked questions
AAC or M4A?
M4A for libraries; AAC for streaming tools.
Will it sound the same?
Very close at 160 kbps.
Is my OGG file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your OGG file is read directly from your device and never sent anywhere.
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