Is my audio file uploaded anywhere?

No. The tool reads only the filename and file size using the browser File API — no data leaves your device. The FFmpeg command is generated entirely in your browser.

AIFF (Audio Interchange File Format) is an uncompressed audio format developed by Apple. It delivers CD-quality sound but results in large file sizes compared to compressed formats like AAC.

AAC (Advanced Audio Coding) is a lossy compressed audio format that generally provides better audio quality than MP3 at the same bitrate. It is the default format for iTunes, Apple Music, and many streaming services.

Which bitrate should I choose?

96 kbps is suitable for voice or podcasts. 128 kbps is the standard for general music listening. 192 kbps offers high quality for music. 256 kbps is Apple Music's default and is recommended for archival purposes.

Do I need FFmpeg installed?

Yes. FFmpeg is a free, open-source tool available on Windows, macOS, and Linux. Install it from ffmpeg.org, then paste the generated command in your terminal.

Can I convert .aif files too?

Yes. Both .aiff and .aif are the same format. FFmpeg handles both extensions automatically — just select or type in either file extension.

What AAC encoder does FFmpeg use?

By default, FFmpeg uses its built-in AAC encoder (aac). For higher quality, you can also use libfdk_aac if your FFmpeg build includes it: replace -codec:a aac with -codec:a libfdk_aac.

AIFF to AAC Converter

Name: AIFF to AAC Converter
Availability: InStock
Author: Nham Vu

Drop or select an AIFF file to inspect its details, then copy the FFmpeg command to convert it to AAC.

Drop your AIFF file here, or browse

.aiff and .aif files — nothing is uploaded

Conversion Options

Output Bitrate

96 kbps (voice / podcasts) 128 kbps (standard music) 192 kbps (high quality) 256 kbps (Apple Music / archival)

Output Filename

Or Type a Filename Manually

Use this if you already know the filename and do not want to select a file.

FFmpeg Command

ffmpeg -i "input.aiff" -codec:a aac -b:a 128k "output.aac"

Batch Convert (Linux / macOS)

for f in *.aiff; do
  ffmpeg -i "$f" -codec:a aac -b:a 128k "${f%.aiff}.aac"
done

Batch Convert (Windows CMD)

for %f in (*.aiff) do ffmpeg -i "%f" -codec:a aac -b:a 128k "%~nf.aac"

About AIFF and AAC

AIFF Uncompressed Apple format. Lossless, large files. Common in GarageBand and Pro Tools on macOS.

AAC Lossy compressed format with better quality than MP3 at the same bitrate. Default for Apple Music, iTunes, and iOS.

Converting AIFF to AAC is a one-way lossy process. Keep your AIFF originals if you need lossless copies.

Summary

Drop or select an AIFF file to inspect its details, then copy the FFmpeg command to convert it to AAC.

How it works

Select or drag-and-drop your AIFF file into the drop zone.
The tool reads the filename and size locally — nothing is uploaded.
Choose your target AAC bitrate (96, 128, 192, or 256 kbps).
Click "Copy Command" to copy the FFmpeg command to your clipboard.
Paste the command in your terminal and run it to convert the file.

Use cases

Convert studio AIFF recordings to AAC for Apple Music or iTunes.
Reduce file size before uploading tracks to streaming platforms.
Batch-convert multiple AIFF files using the same FFmpeg pattern.
Create AAC files for use in iOS/macOS apps or video projects.
Archive large AIFF masters while keeping compressed AAC copies for everyday use.
Convert macOS GarageBand AIFF exports to AAC quickly.
Prepare audio for podcast distribution in AAC format.
Optimize audio for mobile playback with efficient AAC encoding.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu