Convert 3GPP Multimedia (.3gp) to Adaptive Multi-Rate Audio (.amr) 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 .amr file when it's ready.
Both 3GP and AMR originate from the same GSM mobile ecosystem. The 3GP container wraps video and audio streams together, while the AMR (Adaptive Multi-Rate) format is a standalone audio file containing only the voice-optimized codec operating at 8 kHz with bitrates from 4.75 to 12.2 kbps. Converting 3GP to AMR strips the video track and extracts the AMR audio stream, often as a direct copy without re-encoding, producing the smallest possible voice file.
AMR files are still used in telephony systems, voicemail servers, IVR (Interactive Voice Response) platforms, and embedded devices where bandwidth is extremely limited. A standalone AMR file is far smaller than the 3GP wrapper — removing the video track and container overhead can cut file size by 80-95%. This conversion is also useful when feeding audio to speech recognition systems optimized for AMR input, or when sending audio via MMS on networks that enforce strict size limits.
When the 3GP file already contains AMR-NB audio, FFmpeg performs a direct stream copy — the AMR frames are extracted without decoding and rewritten into a standalone .amr file with the proper #!AMR\n header. This is nearly instantaneous and completely lossless. If the 3GP contains AAC audio instead, FFmpeg decodes to PCM then re-encodes using libopencore-amrnb at 8 kHz mono, targeting the specified AMR bitrate mode (MR475 through MR122).
For stream copy (AMR-to-AMR), quality is bit-identical to the source — no generation loss occurs. When transcoding from AAC to AMR, significant quality reduction is expected because AMR is a narrow-band codec limited to 4 kHz audio bandwidth and 12.2 kbps maximum. Voice remains intelligible but music and ambient sound will be heavily degraded.
| Device | 3GP | AMR |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| 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
3GP to AMR conversion is ideal when you need the smallest possible voice-only audio file for telephony, MMS, or legacy mobile systems that consume raw AMR streams.
Saker overforing
HTTPS-krypterade uppladdningar
Integritet forst
Filer raderas automatiskt efter bearbetning
Ingen registrering
Borja konvertera direkt
Fungerar overallt
| No |
8MB free, 50MB Nitro
Valfri webblasare, valfri enhet
| Funktion | 3GP | AMR |
|---|---|---|
| Fullstandigt namn | 3GPP Multimedia | Adaptive Multi-Rate Audio |
| Filandelse | .3gp | .amr |
| Bast for | Mobile optimized | Speech optimized |