3G2 to WMA Converter

3G2 to WMA Converter

This tool extracts the audio track out of a .3g2 mobile video and saves it as a standalone .wma (Windows Media Audio) file — the video frames are discarded, audio only. A .3g2 is a 3GPP2 container: the CDMA-network cousin of .3gp, written by phones on CDMA2000 carriers (the Verizon- and Sprint-class networks of the 2000s). Those US CDMA networks have been wound down — Verizon shut off its 3G CDMA network on December 31, 2022 — so most .3g2 files today come from genuinely retired phones and old backups. This page explains what's actually inside a 3G2, why WMA is a legacy target, and when you should pick something modern instead.

3G2 Format at a Glance

WMA Format at a Glance

Both ends of this conversion are dated, which makes it a double-legacy job: audio from a phone on a network that no longer exists, re-encoded into a late-1990s Microsoft codec. That's fine when something specifically demands a .wma file — and the wrong choice for anything modern.

How to Convert 3G2 to WMA

1. Upload Your 3G2 File: Drag and drop your .3g2 file onto the page, or click "+ Add Files" to browse. You can queue several clips at once and they all extract with the same settings.
2. Pick a Quality Preset: Open Advanced Options and choose a Quality Preset (Lowest through Highest), or set a Constant Bitrate, Variable Bitrate, or Custom Bitrate directly. The output uses the standard WMA codec — a higher bitrate is a ceiling on detail, not a way to add detail the source never captured.
3. Set Audio Channel, Sample Rate, or Trim: Leave Audio Channel and Audio Sample Rate on "Original" to copy the source, or downmix to Mono and resample for a smaller file. Use Trim to keep only the part you need.
4. Convert and Download: Click "Convert" and download the WMA file. No sign-up, no watermark.

Frequently Asked Questions

What exactly is a 3G2 file, and how is it different from 3GP?

A .3g2 is the 3GPP2 container, standardized in January 2004 for CDMA2000 networks, while .3gp is the 3GPP container for GSM/UMTS networks. They are structurally the same ISO base-media family and carry most of the same video and audio, but 3G2 can also hold CDMA-specific speech codecs (the EVRC and QCELP/13K vocoders) that 3GP does not. In practice the split followed the carrier: CDMA-network phones (Verizon, Sprint era) wrote .3g2; GSM-network phones wrote .3gp. If your file is actually a .3gp, use the 3GP to WMA converter instead — it does the same extraction.

Why does my extracted 3G2 audio sound like telephone quality?

Because it probably was. Many 3G2 clips store audio as AMR-NB — a 3GPP speech codec adopted in October 1999 that samples at just 8 kHz and keeps only the 200 Hz–3,400 Hz band needed to understand spoken words — or as a CDMA speech vocoder (EVRC/QCELP) built for the same voice-only job. Converting that to WMA preserves the speech faithfully but cannot regenerate the high and low frequencies a speech codec never recorded. No bitrate or codec choice can widen frequencies the phone never stored.

Will converting 3G2 audio to WMA improve the sound quality?

No. It changes the codec, not the underlying recording. If the 3G2 stored AMR-NB or a CDMA speech vocoder, the WMA output is a clean copy of telephone-grade audio at best. WMA is itself a lossy codec, so a higher Quality Preset only makes the file larger without adding detail that was never captured. Choose WMA for legacy compatibility, not to recover fidelity.

What happens if my 3G2 already contains AAC audio?

Some later CDMA phones and apps store AAC inside the 3G2 container (3G2 supports AAC, though not the HE-AAC v2 variant). WMA can't carry an AAC stream unchanged, so the converter re-encodes it — a second lossy pass on top of the original compression. To keep that generation loss negligible, pick a Quality Preset or Custom Bitrate that meets or exceeds the source bitrate. Since AAC already has far broader support than WMA, it's usually better to keep the audio as AAC with the 3G2 to AAC converter unless a .wma file is specifically required.

Should I really convert to WMA, or is MP3 or AAC a better target?

In most cases MP3 or AAC is better. WMA is a proprietary Microsoft format with the narrowest playback support of the common audio types, and Microsoft itself moved its stores and devices off lossy WMA years ago. WMA only makes sense when something on the receiving end specifically demands a .wma file — an old Windows Media Player library, legacy Windows software, or hardware built around the format. For anything that needs to play on a modern phone, Mac, or browser, use the 3G2 to MP3 converter for the widest reach, or the 3G2 to AAC converter for better quality at the same bitrate.

Which WMA codec does the output use, and is stereo preserved?

The converter outputs standard Windows Media Audio — the WMA v2 (WMAV2) lossy codec Microsoft first released on August 17, 1999 — stored in the ASF container. WMA Standard encodes up to 48 kHz with a maximum of two channels (stereo). A genuinely stereo source stays stereo when Audio Channel is left on "Original"; an AMR-NB or CDMA speech source is mono, so there is no second channel to recover.

Does extracting audio remove the video, and can I keep both instead?

Extraction discards the picture from the output only — your original 3G2 file is untouched, and the WMA result contains audio with no video. If you want to keep both the video and the sound in a modern container, use the 3G2 to MP4 converter instead of extracting the audio.

How are my files handled, and how long do you keep them?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion. There is no sign-up, no watermark, and your files are never shared or made public. In our testing, a 60-second 3G2 voice clip with AMR-NB audio extracted to a roughly 80–110 KB WMA file at a Medium preset — speech recordings stay small because there's little high-frequency detail to encode.