Best free mastering AI tools

Songmastr is an AI-powered online audio mastering tool that automatically masters your songs to match a reference track. Simply upload your song and a reference, and the AI will adjust the RMS, frequency response, peak amplitude, and stereo width to create a professional, polished sound. It's perfect for musicians, producers, and content creators. The service is free for up to 7 songs per week, with no registration required.