Convert MP3 to AAC on Mac
Turn MP3 Audio files into AAC Audio right on your Mac — fully offline. No uploads, no watermark, no size limit. Drag in one file or a whole folder and convert in seconds, accelerated for Apple Silicon.
How to convert MP3 to AAC on a Mac
Open Offline Converter for Mac and drag your MP3 file (or many) into the window.
Choose AAC as the output format and adjust quality or size if you need to.
Click Convert — the AAC file is saved straight to your Mac. Done, offline.
Why convert MP3 to AAC locally
Your files stay private
Your MP3 files never get uploaded. Everything is processed on-device, so sensitive photos and documents stay yours.
No watermark, no limits
Convert as many MP3 files to AAC as you want — no watermark, no size cap, no daily quota.
Fast on Apple Silicon
Conversion is hardware-accelerated and runs at the speed of your SSD, even for large batches.
About MP3 and AAC
MP3 Audio. MP3 Audio is a common audio format. AAC Audio. AAC Audio is a widely supported audio format.
MP3 to AAC — FAQ
Is converting MP3 to AAC free?
You can convert MP3 Audio to AAC Audio on your Mac with the free trial. There's no watermark and nothing is uploaded.
Do my MP3 files get uploaded?
No. The conversion happens entirely on your Mac. Your MP3 files never leave your device — it even works offline.
Can I convert many MP3 files at once?
Yes. Drop a whole folder of MP3 files and convert them all to AAC in a single batch.