Convert AAC to ALAC — Free Online Converter

AAC is a lossy codec delivering transparent-sounding audio at 128-256 kbps, while ALAC (Apple Lossless Audio Codec) provides bit-for-bit perfect reproduction of the original audio. Apple open-sourced ALAC in 2011, and it has since become the preferred lossless format within the Apple ecosystem — iTunes, Apple Music, iPhone, iPad, HomePod, and AirPods Max all decode ALAC natively. Converting AAC to ALAC wraps the decoded audio in a lossless container, useful when you need an uncompressed-quality file that stays fully compatible with Apple devices.

If your Apple Music library or iTunes collection contains AAC tracks and you want to archive them in a lossless format for future-proofing, ALAC is the logical choice. Unlike FLAC, ALAC files play natively on every Apple device without third-party apps. The M4A container (shared by both AAC and ALAC) means metadata, artwork, and chapter markers carry over seamlessly.