Convert Advanced Audio Coding (.aac) to 3GPP Multimedia (.3gp) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .aac 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 .3gp file when it's ready.
AAC (Advanced Audio Coding) is the dominant lossy codec for music distribution, used by iTunes, YouTube, and every major streaming platform since its MPEG-2 standardization in 1997. 3GP is a lightweight multimedia container designed by the 3rd Generation Partnership Project for mobile phones operating on 3G networks. Converting AAC to 3GP wraps your audio inside a container that older feature phones and low-bandwidth mobile devices expect, making it possible to send audio clips via MMS or play them on handsets that lack a standalone AAC decoder.
Feature phones from manufacturers like Nokia, Samsung, and LG shipped with native 3GP playback but no raw AAC support. If you need to send a voice memo or music clip to someone on a basic handset, or upload audio to an MMS gateway that only accepts 3GP, this conversion is essential. 3GP also strips unnecessary metadata, producing smaller files suited for constrained storage.
The conversion re-muxes or transcodes the AAC stream into a 3GP container (ISO base media file format variant). If the target device supports AAC-in-3GP, the audio stream can be copied directly without re-encoding, preserving the original bitrate and quality. Otherwise FFmpeg transcodes to AMR-NB (8 kHz, 12.2 kbps) or AMR-WB (16 kHz, 23.85 kbps), the native 3GP audio codecs. The output file is typically under 1 MB per minute of speech-quality audio.
When the AAC stream is muxed directly into 3GP, quality is identical to the source. If transcoding to AMR-NB is required, expect significant quality reduction — AMR-NB is narrowband (300-3400 Hz) and optimized for speech, not music. AMR-WB preserves a wider 50-7000 Hz range. For music content, try to keep AAC inside 3GP rather than transcoding to AMR.
| Device | AAC | 3GP |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Native |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AAC to 3GP conversion bridges modern audio encoding with legacy mobile infrastructure. Use stream copy mode when possible to preserve quality, and only fall back to AMR transcoding when the target device genuinely lacks AAC decoding support.
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| No |
| Χαρακτηριστικό | AAC | 3GP |
|---|---|---|
| Πλήρες όνομα | Advanced Audio Coding | 3GPP Multimedia |
| Επέκταση | .aac | .3gp |
| Ιδανικό για | Superior to MP3 | Mobile optimized |