OGG to AAC - Online Audio Converter
Convert OGG to AAC online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About OGG to AAC
OGG Vorbis is an open codec for music at lower bitrates than MP3, with thin support on Apple hardware. AAC re-encodes the sound with the MPEG-4 successor codec used by streaming services and Apple Music. Two lossy passes stack, so convert from the master recording when possible rather than chaining shares. Use 256k for music to leave headroom for the second pass. Confirm the container extension on export, since ADTS and MP4 wrappings need matching players.
Why convert OGG to AAC?
- Smaller files with AAC lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
OGG vs AAC
| Codec | Vorbis | AAC |
|---|---|---|
| Compression | lossy | lossy |
| Sample behavior | Quality set by bitrate | Quality set by bitrate |
| Typical use | OGG Vorbis is Xiph's open codec for music at lower bitrates than MP3. | AAC is the MPEG-4 successor to MP3 used by YouTube and Apple Music. |
When not to convert OGG to AAC
- Skip AAC for archival masters: lossy compression discards detail, so keep the OGG original.
- Keep a master copy: repeated exports stack small losses, so archive OGG before batch AAC shares.
Limits
Starting point: OGG - OGG Vorbis is Xiph's open codec for music at lower bitrates than MP3. Apple devices prefer AAC; convert for iPhone playback. Container variants (ADTS, MP4) need matching extensions on export. Encode AAC (AAC) from OGG at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.