Convert 3GPP2 Multimedia (.3g2) to Free Lossless Audio Codec (.flac) online for free. Fast, secure video conversion with no watermarks or registration.
Upload your .3g2 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 .flac file when it's ready.
FLAC (Free Lossless Audio Codec) is the most widely supported open-source lossless audio format, capable of compressing audio to 50-60% of its uncompressed size while preserving every sample bit-for-bit. Converting 3G2 to FLAC extracts the audio from old CDMA phone recordings and stores it in a lossless, universally supported container with excellent metadata and tagging capabilities.
Unlike Apple's ALAC, FLAC is supported natively on Android, Linux, and most media players across all platforms. This makes it the ideal lossless extraction target when you are not exclusively in the Apple ecosystem and want maximum compatibility for your preserved phone audio recordings.
FLAC is the gold standard for lossless audio archival outside the Apple ecosystem. When extracting audio from 3G2 files, FLAC ensures that no additional quality loss occurs beyond what the original phone microphone and AMR codec introduced. The lossless archive can then be converted to any lossy format (MP3, AAC, OGG) in the future without compound quality degradation.
FLAC also has robust metadata support through Vorbis comments — you can tag recordings with title, artist, date, description, and custom fields. This is far superior to standalone AMR files, which have no metadata capability. For building a searchable, well-organized archive of legacy phone recordings, FLAC provides the structure you need.
FFmpeg decodes the AMR-NB or AMR-WB audio from the 3G2 container, then re-encodes it using the FLAC encoder at compression level 5 (the default balance of speed and size). Output is typically 16-bit at 44.1 kHz in a native FLAC container with Vorbis comment metadata. The video track is discarded with the -vn flag. FLAC compression level (0-8) affects only encoding speed and file size, never quality — all levels produce bit-identical decoded audio.
FLAC is mathematically lossless — decoded audio is identical to the PCM input, sample for sample. The quality ceiling is determined entirely by the 3G2 source: AMR-NB at 8 kHz provides telephone-grade audio, while AMR-WB at 16 kHz offers wideband speech. FLAC preserves exactly what the original recording captured, with file sizes roughly half that of equivalent uncompressed WAV or AIFF output.
| Device | 3G2 | FLAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Native |
| Linux | Partial | Native |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
Converting 3G2 to FLAC gives you the best cross-platform lossless audio archive. With open-source tooling, excellent metadata support, and universal player compatibility, FLAC is the ideal preservation format for legacy phone recordings.
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8MB free, 50MB Nitro
Alle nettlesere, alle enheter
| Egenskap | 3G2 | FLAC |
|---|---|---|
| Fullt navn | 3GPP2 Multimedia | Free Lossless Audio Codec |
| Filendelse | .3g2 | .flac |
| Best egnet for | Mobile optimized | Lossless compression |