Convert FLAC to MP3

FLAC is lossless: it compresses audio like a ZIP file compresses text, so the decoded sound is bit-for-bit identical to the original master. That makes it the right format for archiving music and for high-resolution downloads, but many car stereos, older iPhones and iTunes libraries, some smart speakers and budget MP3 players cannot play it, and FLAC files are large, typically 25-35 MB for a four-minute song.

MP3 is understood by virtually every device ever made. Converting from a lossless source is the best case for MP3, because the encoder starts from perfect audio instead of an already-compressed file. At 320 kbps, the highest MP3 bitrate, the result is practically indistinguishable from the FLAC on most equipment and about a third of the size; 192 kbps is transparent for most listeners at under a quarter of the size. Hi-res FLAC files (24-bit, 96 kHz and so on) are accepted and encoded at a sample rate MP3 supports.

Encoding uses LAME inside FFmpeg, running in your browser tab, so your music collection stays on your device. Tags such as artist, album and cover art are not copied, which keeps the files clean but means you may want to re-tag them in your music app. Keep the FLAC originals: converting MP3 back to FLAC cannot restore what the MP3 encoder removed.