Convert 3G2 to AAC — Free Online Converter

Extracting audio from 3G2 mobile videos lets you rescue voicemails, phone conversations, ambient recordings, and voice memos captured on old CDMA phones like those sold by Verizon and Sprint in the early 2000s. AAC (Advanced Audio Coding) is the ideal extraction target — it delivers superior sound quality at lower bitrates compared to MP3 and is natively supported by iPhones, iPads, iTunes, Android devices, and every modern media player.

Our converter strips the video track from your 3G2 file and transcodes the audio stream to AAC format. Since 3G2 files typically contain AMR (Adaptive Multi-Rate) audio recorded at very low bitrates for efficient cellular transmission, the AAC output faithfully represents the original audio fidelity while wrapping it in a universally compatible container.

3G2 files bundle video and audio together in a single container, but often the audio content is what truly matters — voicemail messages, phone call recordings, or audio notes from a deceased relative's old flip phone. Extracting the audio to AAC liberates this content from the obsolete container and makes it universally accessible on any modern device or platform.

AAC is the default audio standard for Apple devices and iTunes, making it trivial to add extracted audio to your music library or sync to an iPhone. It achieves perceptually transparent quality at 128 kbps — more than sufficient for the low-bitrate AMR audio typically found in 3G2 files. The format supports rich metadata tagging, so you can organize extracted clips with proper titles and dates for long-term archival.

3G2 files typically contain AMR-NB (narrowband, 8 kHz sampling, 4.75-12.2 kbps) or AMR-WB (wideband, 16 kHz sampling, 6.6-23.85 kbps) audio. FFmpeg decodes the AMR stream and re-encodes it to AAC-LC (Low Complexity) at 128 kbps with a 44.1 kHz sample rate for maximum player compatibility. The video track is discarded entirely using the -vn flag. If the 3G2 already contains AAC audio, FFmpeg can perform a direct stream copy instead.