3GP to M4A Converter

How to Convert 3GP to M4A Online

1. Upload Your 3GP File: Drag and drop or click "Add Files" to select .3gp or .3g2 recordings from your computer. Old Nokia, Samsung, Sony Ericsson, and BlackBerry phone clips, MMS attachments, voice memos saved by mid-2000s feature phones, and short video recordings exported from older Android handsets are all accepted. Batch upload is supported — drop a whole folder of legacy phone files in one pass.
2. Pick AAC Bitrate (M4A's codec): Default is 128 kbps constant bitrate AAC. Pick a quality preset (Lowest through Highest) for one-click selection, target a specific file size in KB/MB, set a percentage of the source size, or choose a custom CBR/VBR rate (24, 48, 64, 96, 128, 192, 256, 320 kbps). 3GP audio is usually AMR-NB at 4.75-12.2 kbps or AMR-WB up to ~24 kbps — there is no benefit to picking 320 kbps for a speech source. 64-96 kbps mono AAC is the sweet spot for voice memos; 128-192 kbps stereo is right when the 3GP file holds AAC music or video soundtracks.
3. Set Sample Rate, Channels, and Trim (Optional): 3GP audio is typically 8 kHz (AMR-NB) or 16 kHz (AMR-WB). Keep "Original" for the smallest output, or upsample to 44.1 kHz for iTunes / Apple Music libraries and 48 kHz for video-editor workflows in Final Cut or iMovie. Pick mono (correct for AMR voice — half the file size) or stereo (only useful if the source actually has two channels). Optionally trim with start time and duration in seconds or HH:MM:SS.sss to extract a specific clip from a longer phone video.
4. Convert and Download: Click Convert. Files process in your browser session and download individually or as a ZIP — no sign-up, no watermark, no upload to a third-party server.

Why Convert 3GP to M4A?

3GP is the multimedia container format defined by the 3rd Generation Partnership Project for GSM/UMTS mobile devices — the standard wrapper for video and audio recorded by phones from roughly 2002 to 2012. The audio inside is typically AMR-NB (4.75-12.2 kbps narrowband speech), AMR-WB (6.6-23.85 kbps wideband speech), or sometimes AAC. M4A is Apple's preferred audio container — an MPEG-4 wrapper around AAC introduced with iTunes in 2001. Converting 3GP → M4A strips the video track (if present) and re-encodes the audio for the Apple ecosystem:

• iPhone, iPad, and Apple Watch playback — iOS handles 3GP video inconsistently and Voice Memos / Apple Music / the Files app expect M4A/AAC. Converting once means a tap-to-play file on every Apple device including over CarPlay.
• iTunes / Apple Music library import — iTunes silently skips .3gp files at import. M4A imports cleanly with metadata, lands in your library and playlists, and syncs across devices via iCloud Music Library.
• iMovie, GarageBand, Final Cut, Logic Pro — Apple's creative apps accept M4A/AAC natively but reject raw 3GP audio extraction. Converting once unlocks the entire Apple media-creation workflow for old phone-clip narration, voiceovers, and family-archive podcasts.
• Pulling audio from old phone video clips — a 2008-era Nokia or Samsung video of a band, a wedding speech, or a child's first words is often locked inside a .3gp container that modern Apple players struggle with. Pulling the audio out as M4A saves the moment in a format every Apple device plays.
• Bluetooth headphones and AirPods — AirPods and many AAC-capable Bluetooth headphones decode AAC natively over Bluetooth (better than the SBC fallback). An M4A streams at full quality where a 3GP would have to be transcoded by the phone first.
• Reducing storage from a full video container to audio only — a 50 MB 3GP phone video typically yields a 3-5 MB M4A once the video track is discarded, useful for podcast-style archives where the visuals do not matter.

If you want a more universal target instead of Apple-specific, see 3GP to MP3; to keep the video track instead of extracting audio, see 3GP to MP4.

3GP vs M4A — Format Comparison

Source-to-Target Bitrate Quick Guide

Frequently Asked Questions

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

Both are accepted by this converter and both are 3GPP-family containers. .3gp is the profile defined for GSM/UMTS phones (most Nokia, Samsung, Sony Ericsson handsets); .3g2 (3GPP2) is the profile defined for CDMA phones from carriers like Verizon and Sprint in the 2003-2010 era. The wrappers are nearly identical and both typically hold AMR or AAC audio inside.

Will converting 3GP to M4A keep only the audio?

Yes. The video track inside the 3GP container is discarded and only the audio stream is decoded and re-encoded as AAC inside the M4A wrapper. If the 3GP file is audio-only (a voice memo with no video track), the audio is simply re-encoded. If you want to keep the video, convert to MP4 instead.

Why convert to M4A instead of MP3?

M4A is the right choice when the destination is the Apple ecosystem — iTunes, Apple Music, iPhone, iPad, Mac, CarPlay, AirPods. M4A imports natively into Apple Music with metadata, AirPods decode AAC over Bluetooth without a transcoding step, and Voice Memos / Files / iMessage all preview it inline. Pick MP3 instead if the file needs to play on older car decks, USB head units, or non-Apple devices that may not handle M4A.

Will converting 3GP to M4A improve my audio quality?

No. The audio inside a 3GP file was already encoded with a lossy codec (AMR or AAC) at low bitrates designed for 3G mobile networks. Re-encoding to AAC cannot restore frequencies that AMR threw away — for AMR-NB sources, content above 3.4 kHz is permanently gone; for AMR-WB, above 7 kHz. The conversion buys you Apple-native playback, not better fidelity.

What bitrate should I pick for an old phone recording?

For AMR-NB voice recordings (the common case for 2002-2010 feature phones), 64 kbps mono AAC is enough — it preserves every frequency the source captured and going higher just wastes bits. For AMR-WB or in-container AAC, 96-128 kbps mono or stereo is the sweet spot. If the recording has music or background ambience worth preserving, use 128-192 kbps. Going above 192 kbps for any 3GP source is overkill because the source codec already capped what's recoverable.

Should I keep it mono or convert to stereo?

Keep it mono. AMR is always single-channel, and most 3GP voice recordings are mono regardless of inner codec; "converting" mono to stereo just duplicates the same channel into both ears, doubling file size with no quality benefit. Mono M4A plays correctly on stereo speakers, AirPods, and headphones automatically. Use stereo only if the 3GP source actually has stereo AAC audio, which is rare and limited to mid-2010s smartphone video clips.

Can I trim a long phone video before extracting the M4A?

Yes. Use the trim section to enter a start time and a duration. Both fields accept seconds (12.5) or HH:MM:SS.sss format (00:01:30.500). Useful for pulling a single quote out of a long phone-video interview, isolating one song from a concert clip, or chopping silence off the start and end of a voice memo before saving the audio.

Will track titles and tags transfer from 3GP to M4A?

Most 3GP files from feature phones carry no meaningful metadata — just a filename and a date stamp. The M4A wrapper supports MPEG-4 atoms for title, artist, album, track number, and year, so any metadata that does exist in the source carries across; you can also edit the tags after conversion in iTunes or the Music app. Embedded album art is rare in 3GP sources and typically absent.

Are there file size or batch count limits?

No. Files process entirely in your browser session — there is no upload to our servers, no batch count cap, and no per-file size limit beyond your device's available memory. Drop in a folder of every voice memo from an old SIM-card backup or feature-phone SD card and they all convert in parallel and download as individual M4A files or a single ZIP.