Convert FLAC to AAC — Free Online Converter

Converting FLAC to AAC transforms lossless audio into the most efficient lossy codec widely deployed today. AAC (Advanced Audio Coding) was developed as the successor to MP3 by the MPEG group and delivers better sound quality per bit than MP3 at every bitrate. At 256 kbps, AAC is considered transparent to the original source in double-blind tests by most listeners. This conversion is ideal when you need to shrink FLAC files for portable playback without the compatibility concerns of less common codecs.

FLAC files average 800-1200 kbps, making them impractical for streaming or mobile storage. AAC at 256 kbps reduces file size by roughly 75% while retaining near-transparent audio quality. Apple devices natively play AAC but do not support FLAC without third-party software, so this conversion unlocks direct playback on every iPhone, iPad, Apple TV, and HomePod. AAC is also the mandatory audio codec for YouTube, Spotify (OGG internally but AAC for delivery), and most streaming platforms.