Convert Adaptive Multi-Rate Audio (.amr) to Audio Interchange File Format (.aiff) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .amr 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 .aiff file when it's ready.
AMR delivers voice-grade audio at remarkably small file sizes, but it is a lossy codec optimized exclusively for speech on cellular networks. AIFF (Audio Interchange File Format) is Apple's uncompressed audio standard, storing raw PCM data at CD quality or higher. Converting AMR to AIFF decodes the telephony audio into an uncompressed waveform that is ready for editing in Logic Pro, GarageBand, or any professional DAW on macOS.
Professional audio editors expect uncompressed input to avoid compounding lossy artifacts during processing. AIFF provides a lossless, edit-friendly format that every macOS application supports natively — from Finder's QuickLook to Final Cut Pro's audio timeline. If you need to apply noise reduction, equalization, or normalization to a phone recording, working from an AIFF source avoids the generation loss that re-encoding a lossy format would cause.
FFmpeg decodes the AMR audio into 16-bit signed PCM at the source sample rate (8 kHz for AMR-NB, 16 kHz for AMR-WB) and writes it into an AIFF container. The sample rate and bit depth match what the AMR codec originally captured — upsampling to 44.1 kHz is possible but adds no real detail.
The AIFF output faithfully captures everything the AMR codec preserved. Quality is limited by the source — AMR-NB yields 8 kHz, 13-bit effective speech; AMR-WB yields 16 kHz, wider-bandwidth voice. AIFF does not magically restore frequencies lost during AMR encoding, but it prevents any further degradation.
| Device | AMR | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| 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
AMR to AIFF conversion is ideal when you need an uncompressed, Mac-native version of a voice recording for editing or archival purposes.
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 | AMR | AIFF |
|---|---|---|
| 全称 | Adaptive Multi-Rate Audio | Audio Interchange File Format |
| 扩展名 | .amr | .aiff |
| 最适合 | Speech optimized | Lossless quality |