About
MasteringKit is online AI mastering for musicians who are about to release a song, including songs made with AI music generators. It's free to try: no signup, no credit card. Upload a finished stereo mix, hear it mastered in about a minute, and keep adjusting until it sounds right.
Instead of one take-it-or-leave-it result, you steer it:
11 controls (loudness, ceiling, stereo width, mono safety, saturation, warmth, de-esser, compression and more), an intensity setting and a 6-band EQ.
6 engineer styles, each a different starting point for the same track.
Or just write what you want, like "warmer, less harsh highs", and get a new version with a note on what changed.
Every change is saved as a new version, so you can switch between them while the track plays.
Upload WAV, MP3, FLAC, AIFF, M4A or OGG up to 1.5 GB and 22:30. Download 24-bit WAV or 320 kbps MP3.
A free account adds 10 extra revisions per track. A plan unlocks full-track downloads.
Free browser tools: a LUFS meter, a streaming loudness penalty checker and a BPM and key finder. Files never leave your device.
Your tracks are private to you and are not used to train AI models. English and Simplified Chinese.