Convert FLV to AAC — Free Online Converter

FLV files from the Flash Video era frequently contain audio encoded as MP3 at 44.1 kHz or AAC-LC within Adobe's proprietary container. AAC (Advanced Audio Coding) is the successor to MP3, delivering superior sound quality at equivalent bitrates thanks to its modified discrete cosine transform and temporal noise shaping. Converting FLV to AAC extracts the audio layer and outputs it in a widely compatible format recognized by iOS, Android, iTunes, and every major streaming platform.

You may have FLV recordings — lectures, music performances, podcasts — where only the audio matters. Extracting to AAC gives you a compact, high-fidelity audio file without the video overhead. AAC at 128 kbps matches or exceeds MP3 at 192 kbps in perceptual listening tests. Since Apple adopted AAC as the default iTunes format in 2003, compatibility is universal across modern devices.