Free online 3PG to M4A converter

What the 3PG format is

.3pg is not a widely standardized audio extension. It is often a mistaken or vendor-specific spelling of .3gp, the 3GPP multimedia container used by older mobile phones, videocameras, and messaging applications. A 3GP file can contain AAC, AMR, or other audio streams, with or without video.

Check the file with a media player or ffprobe before converting. If the file is genuinely a 3GP container saved with a nonstandard extension, FFmpeg can usually identify it from the internal data; if it uses a proprietary format, the original recording software may be required.

What the M4A format is

.m4a is an audio-only MPEG-4 container. It most commonly stores AAC audio, which provides smaller files than uncompressed PCM at comparable listening quality, and it can also contain lossless ALAC audio.

M4A is supported by Apple Music, iTunes, current phones, desktop media players, and many audio editors. It is a suitable target when the destination application accepts MPEG-4 audio but rejects 3GP containers or AMR audio.

How to convert 3PG to M4A

Using the online converter

1. Open the 101convert.com converter for this format.
2. Upload the .3pg file. If the service rejects the extension, verify whether the file is actually a .3gp file and rename only the extension if its contents are a standard 3GP container.
3. Choose M4A as the output format and start the conversion.
4. Download the resulting .m4a file and test it in the intended player or editor.

The online option requires no software installation and is free to use. Do not upload recordings containing sensitive information unless the service's handling of uploaded files is acceptable for that material.

Using FFmpeg on a computer

Install FFmpeg, open a terminal in the source-file directory, and inspect the streams first:

ffprobe input.3pg

For a normal audio conversion to AAC M4A, run:

ffmpeg -i input.3pg -vn -c:a aac -b:a 128k output.m4a

-vn removes video, while -b:a 128k sets the audio bitrate. Use 192k or 256k for higher AAC quality, or lower values for smaller speech recordings.

If ffprobe reports that the source audio is already AAC, the audio can usually be placed in an M4A container without another lossy encoding step:

ffmpeg -i input.3pg -vn -c:a copy output.m4a

Quality and compatibility

Transcoding AMR or another lossy source to AAC does not restore discarded detail; it only changes the codec and container. Use stream copying for existing AAC when the target player supports its profile, and transcode when the source is AMR or another codec that M4A does not accept.

Renaming .3pg to .m4a does not convert the file. M4A requires a compatible MPEG-4 audio container, so the audio must be remuxed or encoded with a converter.