Free online AIFF to AMR converter

Source format: AIFF

AIFF (Audio Interchange File Format) is a high-quality, uncompressed audio format developed by Apple. It is widely used in professional audio production, music editing, archiving, and interchange between audio tools because it preserves sound quality without lossy compression. AIFF files are often large, but they are ideal when you need a clean master or an editing source.

Target format: AMR

AMR (Adaptive Multi-Rate) is a compressed audio format designed primarily for speech. It is commonly used in mobile telephony, voice recordings, voicemail systems, and low-bandwidth audio applications. Its main advantages are small file size and efficient speech encoding, but it is not intended for high-fidelity music playback.

How to perform the conversion

The most reliable way to convert AIFF to AMR is with FFmpeg, a powerful command-line audio tool that supports both formats. Because AMR is optimized for voice, the best results usually come from converting speech recordings rather than music.

1. Install FFmpeg on your computer if it is not already available.
2. Open a terminal or command prompt.
3. Run a command such as ffmpeg -i input.aiff -ar 8000 -ac 1 -c:a amr_nb output.amr for narrowband AMR, which is the most common AMR variant for speech.
4. If your FFmpeg build does not support amr_nb directly, you may need a version compiled with AMR support or use another desktop audio converter that can export AMR.
5. Check the resulting file by playing it in a compatible audio player or transferring it to the intended device or system.

If you prefer a simpler workflow, you can also convert the file on 101convert.com for free without installing any software.

Notes on quality and compatibility

AIFF to AMR is a lossy conversion. This means audio detail will be discarded during encoding, and the result will sound noticeably less detailed than the source, especially for music. AMR works best for voice recordings, not stereo music or full-range audio.

For compatibility, note that AMR is usually mono and low sample rate (commonly 8 kHz for AMR-NB). If your AIFF file is stereo or high-resolution, it will be downmixed and resampled during conversion. That is normal, but it can reduce quality. If you need better speech quality at similar sizes, consider whether another modern voice codec is more appropriate for your target device or platform.