Convert 3GPP Multimedia (.3gp) to Advanced Audio Coding (.aac) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .3gp file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .aac file when it's ready.
3GP files use the 3GPP container developed by the 3rd Generation Partnership Project, typically storing H.263 or MPEG-4 Part 2 video alongside AMR or AAC audio at resolutions ranging from 176x144 (QCIF) up to 720x480. Converting to AAC extracts and re-encodes the audio track into Advanced Audio Coding format, the lossy codec standardized in MPEG-4 Part 3 that delivers transparent quality at 128-256 kbps. Because many 3GP recordings already contain AAC audio internally, this conversion can often be a simple stream copy rather than a full re-encode.
3GP audio is frequently trapped in a container that modern music players, podcast apps, and web browsers refuse to recognize. AAC is natively supported on every iPhone, iPad, Android phone, and desktop browser released in the last decade. Extracting to AAC also strips the video track, dramatically reducing file size — a 10 MB 3GP clip with AMR audio at 12.2 kbps might yield a 300 KB AAC file at 128 kbps with far better fidelity. If you have voice recordings, conference calls, or music captured on an older GSM phone, AAC ensures they remain playable everywhere without installing specialty codecs.
FFmpeg demuxes the 3GP container, identifies the audio stream (AMR-NB at 8 kHz, AMR-WB at 16 kHz, or AAC), and either copies the stream directly into an ADTS/M4A wrapper when the source is already AAC, or transcodes AMR to AAC-LC using the native encoder at the specified bitrate. Sample rate is up-converted from 8 kHz to 44.1 kHz when transcoding from AMR-NB to ensure compatibility with standard audio players. Channel layout is preserved — most 3GP audio is mono.
When the 3GP already contains AAC audio, a stream copy is lossless. When transcoding from AMR (4.75-12.2 kbps narrow-band), the source quality is the bottleneck — the AAC output will sound cleaner due to a wider frequency response, but detail that AMR discarded cannot be restored. Expect noticeable improvement in voice clarity at 64 kbps AAC or above.
| Device | 3GP | AAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Converting 3GP to AAC liberates your mobile audio from a legacy container and produces universally playable files with smaller footprints and better codec support across every modern platform.
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| No |
| 기능 | 3GP | AAC |
|---|---|---|
| 전체 이름 | 3GPP Multimedia | Advanced Audio Coding |
| 확장자 | .3gp | .aac |
| 최적 용도 | Mobile optimized | Superior to MP3 |