Lossless audio files are digital audio formats that preserve the original sound quality of recordings without any loss of data. Unlike lossy formats like MP3, which compress audio by removing some information, lossless formats retain every detail of the sound. Common lossless formats include FLAC, ALAC, and WAV. These files are ideal for audiophiles and professionals who require high fidelity in their music or sound recordings. While lossless files take up more storage space than lossy files, they provide a richer listening experience, making them suitable for high-quality playback on audio equipment and during music production.