3G2 to FLAC Converter
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Supports: 3GP, 3G2
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This tool pulls the audio out of a .3g2 mobile video and saves it as FLAC, a lossless format. .3g2 is the 3GPP2 container used by CDMA2000 phones — the carrier-network twin of .3gp — so the typical source is an old Verizon or Sprint handset clip. The conversion exists for one job: freezing whatever audio that phone captured into an archival copy that never degrades again. The video is discarded; you get just the soundtrack.
How to Convert 3G2 to FLAC
- Upload Your 3G2 File: Drag and drop or click "Add Files" to select
.3g2(or.3gp) videos. Batch is supported, so a folder of old phone clips can run in one job. The video track is read only to locate the audio — the picture is not kept in a FLAC output. - Set the Compression level: Use the Compression level slider (1–12). FLAC is lossless at every setting, so this only trades encoding speed against file size — a lower number is faster but larger, a higher number is slower but smaller. The decoded audio is bit-for-bit identical wherever you set it.
- Set Audio Channel and Audio Sample Rate (Optional): Both default to ORIGINAL, which preserves the source. You can force Mono (sensible for a single-mic phone recording) or resample, though keeping ORIGINAL avoids upsampling that adds bytes without adding detail.
- Trim and Convert: Use the Trim panel to set a start time and duration if you only want one moment, then click Convert. No sign-up, no watermark.
What's Inside a 3G2 File, and What FLAC Can Do With It
The audio in a .3g2 is one of a few codecs, and what FLAC gives you depends entirely on which one. FLAC is lossless — it stores the decoded audio exactly — but "exactly" is the ceiling: it cannot add fidelity the phone never recorded.
| Source codec in the 3G2 | What it is | What converting to FLAC gives you |
|---|---|---|
| QCELP / EVRC | CDMA-network speech codecs (Qualcomm PureVoice and EVRC), narrowband telephone-quality voice at an 8 kHz sample rate | An exact, permanent copy of that telephone-quality voice — larger file, identical sound. No fidelity is added. |
| AMR-NB | Narrowband speech codec (200–3,400 Hz, the bandwidth of a phone call), also common on early phones | Same as above: faithful, never-degrading copy of narrowband speech. Larger than the 3G2, sounds the same. |
| AAC | Ordinary lossy music/audio codec on some newer 3G2 clips | The standard lossy-to-lossless case: FLAC freezes the AAC audio and stops further generation loss. It won't recover what AAC already discarded. |
In every case the FLAC will be larger than the original .3g2 and will sound exactly like the source — that growth is the cost of an exact, archival master. If you want a small, shareable file instead, FLAC is the wrong tool: use 3G2 to MP3. To keep the picture rather than just the soundtrack, use 3G2 to MP4. If your file is named .3gp rather than .3g2, the 3GP to FLAC page covers it too.
Frequently Asked Questions
Does this keep the video, or only the audio?
Only the audio. .3g2 is a video container, but FLAC is an audio-only format, so the picture is discarded and you get just the soundtrack as a lossless file. The video track is read only to locate the audio. If you want to keep the picture, use 3G2 to MP4, which re-wraps the video and audio together.
Does this accept .3g2 files from old CDMA phones like Verizon and Sprint?
Yes — that is the main use case. .3g2 is the 3GPP2 container (introduced January 2004) used by CDMA2000 phones, which in the US meant carriers like Verizon and Sprint. Since Verizon shut down its 3G CDMA network at the end of December 2022, clips saved off those old handsets are exactly the kind of footage worth archiving before the files rot. The same pipeline also accepts .3gp from GSM-era phones, since both share the MPEG-4 Part 12 base structure.
Will converting a QCELP or EVRC voice clip to FLAC make it sound better?
No. QCELP and EVRC are CDMA-network speech codecs built for telephone-quality voice at an 8 kHz sample rate — roughly the bandwidth of a phone call. FLAC will preserve that audio exactly, but it cannot add back detail the codec never captured. The honest outcome is a noticeably larger file that sounds identical to the tinny original. FLAC's value here is permanence — a copy that never degrades again — not added fidelity.
Why is my FLAC file so much bigger than the original 3G2?
Because the .3g2 held heavily compressed lossy audio (a low-bitrate speech codec like QCELP, EVRC, or AMR-NB, often well under 13 kbit/s) and FLAC is lossless. Lossless encoding of the decoded stream typically lands far above a low-bitrate speech codec, so a tiny voice clip can become a noticeably larger FLAC. That growth is normal and is the trade-off for an exact, never-degrading copy.
How big does the FLAC come out in practice?
In our testing, a one-minute EVRC voice clip — originally a few hundred kilobytes in the .3g2 — produced a FLAC of a few megabytes, because lossless encoding of the decoded 8 kHz stream needs far more space than the original speech codec used. An AAC-sourced .3g2 lands closer to a typical lossless size for its sample rate. Exact figures depend on the source codec, clip length, and how busy the audio is.
How are my files handled after conversion?
Files are uploaded over an encrypted connection and processed on our servers — no sign-up and no watermark. They are deleted automatically a few hours after conversion and are never shared or made public.