Convert Advanced Audio Coding (.aac) to Android Audio (.android-audio) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .aac file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .m4a file when it's ready.
AAC is already one of Android's natively supported audio codecs, but the Android Audio preset goes further by optimizing encoding parameters specifically for the Android media stack. This conversion ensures your AAC files play flawlessly across the full range of Android devices — from flagship Galaxy phones to budget handsets running Android Go — with optimal bitrate, sample rate, and container settings for the platform.
While Android supports raw AAC, some AAC files encoded with exotic profiles (HE-AACv2 with parametric stereo, USAC, or xHE-AAC) may not decode correctly on older Android versions or budget chipsets. The Android Audio preset normalizes the encoding to AAC-LC in an M4A or 3GP container at parameters every Android device handles reliably: 44.1 kHz, stereo, 128-192 kbps.
FFmpeg decodes the source AAC and re-encodes to AAC-LC profile at 44.1 kHz stereo with a configurable bitrate (default 128 kbps). The output is placed in an M4A container for broad Android compatibility. The encoder avoids HE-AAC and parametric stereo modes that can cause issues on older Android API levels. Audio normalization is optionally applied to ensure consistent volume across tracks.
If the source AAC is already AAC-LC at a reasonable bitrate, re-encoding introduces minimal but technically measurable generational loss. For HE-AAC or HE-AACv2 sources, the re-encode to AAC-LC at 128+ kbps typically sounds equivalent or better, since AAC-LC at higher bitrates avoids the spectral band replication artifacts of HE-AAC. For most listeners, the difference is inaudible.
| Device | AAC | Android Audio |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
The Android Audio preset is a safety net that ensures your AAC audio works everywhere on Android. It is most useful when dealing with AAC files from diverse sources with varying profiles and container formats.
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| No |
| Ominaisuus | AAC | Android Audio |
|---|---|---|
| Koko nimi | Advanced Audio Coding | Android Compatible Audio |
| Tiedostopääte | .aac | .m4a |
| Paras käyttökohde | Superior to MP3 | Android optimized |