3G2 to GSM Converter

Separate audio from 3G2 and export as GSM online

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Built for Everyone

Whether you are a professional editor or a casual user, the converter is designed to be approachable with an interface anyone can navigate.

Audio Extraction

Pull the soundtrack from 3G2 video and save it as GSM. Keep the audio you need without the video weight — ideal for music and podcasts.

No Installation

The converter runs entirely in your web browser. No plugins, no apps, no downloads — just open convertio.tools and start converting immediately.

How to convert 3G2 to GSM

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose gsm or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your gsm file right afterwards

About formats

3G2 (3GPP2 file format) is a multimedia container developed by the 3rd Generation Partnership Project 2 for use on CDMA2000 mobile networks. Built on the ISO base media file format (MPEG-4 Part 12), it stores video encoded with H.263 or MPEG-4 Visual alongside audio in AMR, EVRC, or AAC codecs. The specification was first published in December 2003 to provide a standardized way for CDMA-based phones and networks to handle multimedia messaging and video playback. 3G2 files are engineered for extremely low-bandwidth conditions, achieving playable video quality at bit rates as low as 30-60 kbps. This makes the format especially efficient for mobile video capture on devices with limited processing power and storage. The container supports multiple tracks, timed text for subtitles, and embedded metadata. One significant benefit is near-universal compatibility with CDMA handsets from the mid-2000s era, ensuring reliable playback across a wide range of mobile devices. Though newer formats like MP4 have superseded 3G2 for most purposes, it remains useful for working with legacy mobile content and for situations where minimal file size is the primary concern.
Initial release: December 2003
GSM 06.10 (Full Rate) is the foundational speech codec of the Global System for Mobile Communications standard, ratified by ETSI in 1991 and deployed across hundreds of cellular networks worldwide. Operating at a fixed 13 kbit/s, the algorithm applies Regular Pulse Excitation with Long-Term Prediction (RPE-LTP) to compress 20 ms frames of 8 kHz mono speech into just 33 bytes each. This approach models the vocal tract as a linear predictive filter, encodes the excitation signal, and leverages pitch periodicity for further reduction — tuned to deliver intelligible voice under the bandwidth constraints of early digital mobile channels. The codec powers not only GSM telephony but also many VoIP applications, voicemail systems, and IVR platforms that benefit from its low bitrate. Three concrete advantages stand out. First, extraordinary compression: one minute of speech fits in roughly 100 KB, enabling efficient storage and transmission. Second, universal tooling — libraries such as libgsm and SoX handle encoding and decoding on every major platform. Third, a royalty-free patent landscape that has encouraged adoption across open-source telephony projects like Asterisk and FreeSWITCH.
Initial release: 1991

Frequently Asked Questions

What is the benefit of converting 3G2 to GSM?

GSM 06.10 is the telephony speech codec — ultra-compact voice compression. Converting 3G2 to GSM targets telephony systems, IVR platforms, and voice messaging.

What programs open GSM files?

Open GSM using SoX, telephony systems, and GSM-compatible communication platforms.

Is the conversion private and secure?

Your 3G2 uploads are processed securely and removed right after conversion. Output files are purged within 24 hours to protect your privacy.

Can I batch convert multiple 3G2 files?

You can upload and convert multiple 3G2 files to GSM at the same time. Batch processing runs on our servers so your device stays free.

Can I convert 3G2 to GSM on my phone?

Absolutely. The converter runs entirely in your mobile browser on iOS or Android — upload 3G2, pick GSM, and save the output to your device.

Does converting 3G2 to GSM lose quality?

With proper settings, the converted GSM retains excellent clarity. Lossless formats preserve full quality, while lossy ones trade minimal detail for size.