3GPP to WAV Converter

How to Convert 3GPP to WAV Online

1. Upload Your 3GPP File: Drag and drop or click "Add Files" to select your .3gpp recording. Old camcorder clips, Android voice memos, Symbian-era phone captures, and voicemail attachments all work. Batch upload is supported — pick the whole folder and they process together.
2. Pick Audio Channel: Default is Original (preserves the source mix — usually mono on phone recordings). Choose Mono to force a single channel (smallest file, ideal for AMR-NB speech sources), or Stereo if you plan to overlay effects later in a DAW. AMR audio in 3GPP files is almost always mono; converting to Stereo simply duplicates the channel.
3. Set Audio Sample Rate: Choose from 8000 Hz to 48000 Hz. 8000 Hz matches AMR-NB natively (no resampling artifacts, smallest file). 16000 Hz matches AMR-WB sources. 44100 Hz is CD-quality, expected by most editors and mastering chains. 48000 Hz is the broadcast and video-post standard if you'll sync the audio back to picture.
4. Trim (Optional) and Convert: Flip the Trim toggle from Unchanged to active, then enter a Start Time and Duration in seconds (e.g. 12.5) or HH:MM:SS.sss (e.g. 00:00:12.500). Click Convert. Output is PCM 16-bit Little Endian (PCM_S16LE) — the standard interchange WAV codec every editor reads.

Why Convert 3GPP to WAV?

3GPP is the multimedia container defined by the 3rd Generation Partnership Project for 3G mobile networks, built on MPEG-4 Part 12. The audio inside is almost always AMR-NB (adopted by 3GPP in October 1999) at 4.75–12.2 kbit/s with an 8 kHz sample rate and 200–3400 Hz bandwidth — a speech codec, not a music codec. WAV is the uncompressed PCM container developed by IBM and Microsoft in 1991 and remains the lingua franca of audio editing. Converting 3GPP → WAV decodes AMR once and writes raw PCM, so every subsequent edit is lossless.

• Audacity, Adobe Audition, Reaper, and Pro Tools all import WAV natively — none ship with the AMR decoder by default. Audacity needs the FFmpeg library separately to open .3gpp; WAV works out of the box. If you've been hitting "unsupported file" errors, WAV solves it.
• Voicemails saved as 3GPP (older Android visual voicemail and many carrier email-to-voicemail attachments deliver .3gpp) need to be in WAV or MP3 for archival, legal exhibits, or transcription services like Otter or Rev.
• Forensics and legal discovery prefer uncompressed PCM evidence — re-encoding through another lossy codec destroys spectrogram detail that voice-comparison analysts use. WAV preserves the AMR output verbatim once decoded.
• Speech-to-text pipelines (Whisper, Deepgram, Google Speech-to-Text) accept WAV as a first-class input and often reject 3GPP/AMR; converting first gives you a clean handoff.
• Old camcorder and feature-phone archives can be migrated to WAV for long-term storage, then re-encoded once to FLAC or AAC later without compounding lossy generations.
• Editing for podcast intros or ringtones — the AMR voice can be sweetened (EQ, de-noise, normalize) only after it's PCM. Edit the WAV, then export to MP3 or M4R for delivery.

3GPP vs WAV — Format Comparison

Sample Rate Guide

Upsampling beyond 8 kHz does not recover the audio above 4 kHz that AMR discarded — the spectrum stays band-limited to ~3.4 kHz no matter the target rate. Pick the higher rate only if your editor or downstream tool requires it.

Frequently Asked Questions

Why won't my .3gpp file open in Audacity?

Audacity opens WAV, FLAC, OGG, and (since recent versions) MP3 natively, but reads 3GPP only when the optional FFmpeg library is installed. If you've hit "Audacity did not recognize the type of file," converting to WAV first is the simplest fix — the WAV opens without any extra setup.

Will converting to WAV improve the audio quality?

No. AMR-NB band-limits the original signal to 200–3400 Hz at 8 kHz sampling and discards everything above. The PCM WAV preserves exactly what's there with no further loss, but cannot reconstruct frequencies that were never recorded. Your WAV will sound identical to the source, just in a format every editor reads. Use WAV as the starting point for de-noising, normalization, or EQ — those processes work, the missing high frequencies still do not return.

Should I pick 8000 Hz or 44100 Hz?

If you're archiving or transcribing a phone recording untouched, 8000 Hz is honest about what's in the file and keeps the WAV ~5× smaller. If you're editing in a DAW alongside other tracks — music, sound effects, room tone — pick 44100 Hz so the project's sample rate is uniform; otherwise the DAW resamples on import anyway. Forcing 48000 Hz for a 3GPP voice memo just produces a bigger file that contains the same telephone-grade audio.

Why is the file compression section missing?

WAV is by definition an uncompressed container. The default and only option here is PCM 16-bit Little Endian (PCM_S16LE), which every audio editor and media player accepts. That's why there is no bitrate selector — bitrate is a function of sample rate × bit depth × channels, not a separate dial. To get a smaller file at similar quality, use 3GPP → MP3 instead.

How much bigger will the WAV file be?

A typical 1-minute 3GPP voicemail at 12.2 kbit/s AMR-NB is about 90 KB. As 44.1 kHz 16-bit stereo WAV it's roughly 10.6 MB — about 120× larger. At 8 kHz mono WAV it's about 960 KB, roughly 10× larger. The size jump is the cost of moving from a heavily compressed speech codec to raw PCM samples.

What's the difference between .3gpp, .3gp, and .3g2?

The .3gp and .3gpp extensions both wrap the 3GPP file format — .3gp is shorter and more common on devices; .3gpp shows up on some carrier exports and email attachments. .3g2 is the 3GPP2 variant used by CDMA phones (Verizon, Sprint legacy networks) with slightly different codec lists. All three carry AMR-family audio you can decode to WAV the same way; see also 3GP → WAV.

Can I extract just the audio from a 3GPP video?

Yes. 3GPP files often contain both H.263 / MPEG-4 / H.264 video and AMR audio; this converter discards the video track and writes the audio stream out as PCM WAV. If you only need a clip, set Start Time and Duration under Trim — this avoids decoding the entire file and produces a shorter WAV directly.

Are my files private?

Files are uploaded to a processing server, converted, and held briefly so you can download. They are not shared, indexed, or used for training. No account is required and there is no watermark or quality cap on the output WAV.

What should I do with the WAV after converting?

For long-term archival, re-encode the WAV to FLAC (lossless, ~50% the size of PCM) — see WAV → FLAC. For sharing or smaller file size, encode to MP3 at 96 kbps mono (plenty for voice). For editing, open the WAV directly in your DAW. The point of the WAV step is to break the AMR codec dependency once, then choose the right destination format from there.