Convert Audio Interchange File Format (.aif) to 3GPP Multimedia (.3gp) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .aif 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.
AIF (Audio Interchange File Format) is a short-extension variant of AIFF, developed by Apple in 1988 and based on Electronic Arts' Interchange File Format (IFF). AIF stores uncompressed PCM audio in big-endian byte order, making it the Mac-native counterpart to Microsoft's little-endian WAV format. The .aif extension emerged as a three-character alternative to .aiff for compatibility with classic Mac OS and early Windows file systems that preferred 8.3 naming conventions.
3GP is a lightweight multimedia container standardized by the 3rd Generation Partnership Project for mobile phone networks. Converting AIF to 3GP transcodes studio-quality uncompressed PCM audio into a constrained mobile format using AMR or low-bitrate AAC codecs. The resulting file will be audio-only wrapped in the 3GP video container, suitable for legacy mobile playback and MMS delivery.
AIF files are far too large and use a format unrecognized by most mobile phones, especially older feature phones that expect 3GP containers. A single minute of CD-quality AIF occupies roughly 10 MB of uncompressed PCM, while a 3GP equivalent at AMR-NB uses under 100 KB. This massive size reduction is essential for MMS gateways and 3G network delivery.
Because AIF stores lossless uncompressed audio, converting to 3GP benefits from the highest possible source quality. Unlike re-encoding from MP3 or AAC (which introduces generation loss), AIF-to-3GP produces a single lossy encoding pass from perfect PCM data, yielding the best achievable quality within 3GP's constrained codecs.
FFmpeg reads the AIF container, identifies the big-endian PCM stream (typically pcm_s16be at 44.1 kHz stereo), and decodes it to raw PCM samples. It then encodes to AMR-NB (8 kHz mono, 4.75-12.2 kbps), AMR-WB (16 kHz mono, up to 23.85 kbps), or AAC-LC at a low bitrate, and wraps the result in a 3GP container. The big-endian byte order in AIF is handled transparently by FFmpeg's decoder — there is no quality penalty compared to little-endian WAV sources.
AIF's uncompressed PCM provides the best possible starting point, but 3GP's codecs impose severe quality constraints. AMR-NB compresses to narrowband telephone quality (300-3400 Hz), losing all high-frequency content. AMR-WB extends to 7 kHz but remains below AM radio quality. AAC-LC at 64-128 kbps in 3GP offers the best fidelity for music content. The quality loss from AIF to 3GP is substantial and irreversible.
| Device | AIF | 3GP |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | 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
AIF to 3GP converts Apple's uncompressed PCM format into a mobile-optimized container. Use AAC-LC within 3GP for the best quality when the target device supports it, and keep your original AIF files as lossless masters.
安全传输
HTTPS 加密上传
隐私优先
文件处理后自动删除
无需注册
即刻开始转换
随处可用
任何浏览器，任何设备
| No |
| 特性 | AIF | 3GP |
|---|---|---|
| 全称 | Audio Interchange File Format | 3GPP Multimedia |
| 扩展名 | .aif | .3gp |
| 最适合 | Lossless quality | Mobile optimized |