Convert AAC to MP3

AAC is technically a more efficient codec than MP3 — better quality per bit at the same bitrate. But MP3 wins on universal compatibility: every audio player ever made plays MP3, including older iPods, car stereos, and devices that don't decode AAC. If your destination needs MP3 specifically, converting is the right call. If your destination plays both, stick with AAC.

Yes — both are lossy, so the converter decodes AAC and re-encodes to MP3, adding a generational loss. At 192 kbps MP3 the result is indistinguishable to most listeners; on critical music with revealing equipment, you might hear minor differences. The loss is similar in magnitude to any other lossy-to-lossy conversion.

MP3 typically comes out slightly larger than the source AAC at equivalent perceived quality. AAC achieves the same sound at a lower bitrate than MP3 needs — so converting AAC 192 kbps to MP3 at 192 kbps gives you a slightly worse-sounding MP3, while converting to MP3 at 256 kbps gives you a slightly larger file at matched quality.

Both AAC and MP3 support rich metadata (AAC via MPEG-4 atoms, MP3 via ID3 tags). The converter copies titles, artists, albums, year, track numbers, and album art across cleanly. Sort fields, lyrics, and other less-common tag types may not survive depending on the specific tag structure in the source.

Yes for standard AAC files. iTunes-store purchases from before 2009 had FairPlay DRM that prevents conversion; current Apple Music downloads are DRM-protected too. Files bought / ripped without DRM (CDs imported as AAC, current iTunes Match downloads, voice memos) convert cleanly. DRM-protected files would need to be removed from Apple's ecosystem first.