Convert ALAC to MP4 — Free Online Converter

ALAC stores lossless audio in Apple's M4A container. MP4 (MPEG-4 Part 14) is the universal multimedia container format. M4A and MP4 share the same underlying ISO base media file format — M4A is essentially MP4 with only an audio stream. Converting ALAC to MP4 typically involves encoding to AAC and optionally adding a video stream.

This conversion is needed when lossless ALAC audio must be uploaded to video platforms (YouTube, Facebook, TikTok), combined with visual elements, or served through systems that specifically require the .mp4 extension.

Video platforms require MP4 format for uploads. YouTube, Facebook, Instagram, and TikTok reject M4A files. To publish ALAC audio content with a static image or visualizer, you need an MP4 container with both audio and video streams.

Starting from lossless ALAC ensures the AAC audio in the MP4 is encoded from perfect PCM source material — producing the best possible quality for the target platform.