MasteringKit

MasteringKit is online AI mastering for musicians, producers and Suno song creators. Free to try: no signup, no credit card. Upload a WAV, MP3, FLAC or AIFF mix and hear your song mastered in about a minute, at a loudness that holds up on Spotify, Apple Music and YouTube. Shape it with 11 controls, 6 engineer styles, a 6-band EQ, or a sentence like "warmer, less harsh highs". Every change is a new version to A/B. Export 24-bit WAV or 320 kbps MP3. Free LUFS meter too.