Is this tool really offline?

Yes. All processing happens locally in your browser. Your files never leave your device.

Yes, completely free with no registration required.

Absolutely. No files are uploaded to any server. Everything stays on your device.

JavaScript is required to use these tools. Please enable JavaScript in your browser settings to convert files.

Zero-Server Storage · 100% Private Your files are processed entirely in your browser. Nothing is uploaded, stored, or seen by anyone — safe for confidential & GDPR/HIPAA-sensitive documents.

AIFF to MP3 Converter - Free Offline (No Upload)

Convert AIFF audio files to MP3 format offline in your browser. Choose bitrate. No upload, 100% private and free.

No Upload 100% Private Free

You might also need:

MP3 Cutter WAV to MP3 MP4 to MP3 FLAC to MP3 Audio Merger Speed Changer

Loading Audio Processing Engine

Uses FFmpeg.wasm. First use downloads ~25MB (cached after).

Initializing...

Drop your AIFF files here

or click to select AIFF files

Frequently Asked Questions

Why convert AIFF to MP3?

MP3 is more universally supported across devices. Convert AIFF to MP3 for maximum compatibility with older players and devices.

Does this AIFF to MP3 converter work offline?

Yes. FFmpeg.wasm runs entirely in your browser. Your files never leave your device.

Is there a file size limit?

No server limit. Large AIFF files may take time to process depending on your device.