OFFICIAL PAGE: X-MINUS.PRO
X-MINUS.PRO is a free AI-based service for separating your music file into 2 stems, vocals and instruments. The service accepts wav or mp3 files up to 100MB in size and up to 12 minutes in duration. The separated files are returned in mp3 form. Registered users who donate through Patreon are provided with more options including advanced models with superior separation as well as the ability to download the results in lossless FLAC form.
Screenshot courtesy of X-MINUS.PRO