How-to guide
How to extract audio from a 3GP file
3GP is the early mobile video container — what pre-smartphone Nokias, Sony Ericssons and cheap Android phones recorded in, and still the format some feature phones and low-end recorders produce today. It is almost always AMR audio in a 3GPP container.
AMR (adaptive multi-rate) is optimised for speech at low bitrates (4.75–12.2 kbps). The exported WAV will faithfully reproduce what is there — clean speech decoded to PCM, but do not expect music to sound anything but rough.
Step-by-step
- Open VideoSplit.io. Modern browsers decode 3GP via the Web Audio path.
- Drop your .3gp or .3g2 file. Drag and drop. 3GP files are usually tiny (a few MB even for minutes of content), so everything is instant.
- Pick WAV for maximum fidelity. WAV preserves the decoded AMR with no further loss. MP3 adds a second lossy pass, which is rarely a good tradeoff for already-low-bitrate sources.
- Download. Saves as .wav or .mp3 with the same base name.
Tips for better results
- 3G2 is the CDMA variant — same container, same decoder path, same result.
- Old 3GP voice memos from vintage phones are a great use case; they digitise cleanly.
- If you want to transcribe a 3GP recording with Whisper, WAV output works directly without any re-conversion.
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