Free online OPUS to 3GA converter

Source format: Opus

Opus is a modern, highly efficient audio codec designed for low-latency speech and music streaming. It is widely used in VoIP, online meetings, gaming voice chat, web audio, and streaming platforms because it delivers good quality at relatively low bitrates. Opus audio is commonly stored in an .opus file, usually inside an Ogg container.

People use Opus when they want compact files and strong quality for speech or mixed audio. It is especially common in browsers, communication apps, and open media workflows.

Target format: 3ga

3GA is a mobile-oriented audio container associated with 3GPP multimedia files. It is often used by older phones and some mobile devices for voice recordings and audio clips. A .3ga file may contain audio encoded with codecs such as AAC, AMR, or related 3GPP-supported formats.

The main advantage of 3GA is compatibility with legacy mobile devices and software that expects 3GPP audio containers. It is useful when you need to play or transfer audio to older phones, embedded systems, or specialized mobile workflows.

How to perform the conversion

The most reliable way to convert Opus to 3GA is with FFmpeg, because it can decode Opus and re-encode the audio into a 3GPP-compatible format.

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt in the folder containing your .opus file.
3. Run a conversion command such as ffmpeg -i input.opus -c:a aac output.3ga.
4. If your target device requires a different codec, you can try ffmpeg -i input.opus -c:a amr_nb output.3ga for narrowband voice-oriented compatibility, if supported by your FFmpeg build.
5. Test the resulting .3ga file on the intended device or player.

If you prefer a graphical workflow, you can use desktop audio tools that support export through FFmpeg or 3GPP-compatible containers, but FFmpeg remains the best general-purpose option for this conversion. You can also convert the file on 101convert.com for free, without installing any software.

Notes on quality and compatibility

Opus is usually higher quality and more efficient than the codecs typically used in 3GA, so this conversion may reduce audio fidelity depending on the chosen output codec and bitrate. Because 3GA is a container rather than a single codec, compatibility depends on which codec is inside the file and what the target device supports.

Some older devices only accept AMR or limited AAC profiles, so a 3GA file encoded with AAC may not play everywhere. If the goal is maximum compatibility with legacy phones, test the output on the actual device. Also note that converting from Opus to 3GA is a lossy-to-lossy transcode, so repeated conversions should be avoided.