MixMasterAI is a free online mixing and mastering tool. Upload a raw song, pick a genre or character preset, and get a release-ready master in under 60 seconds. The engine analyzes your track, applies genre-matched EQ, compression, stereo processing, and reference mastering, then normalizes to your streaming platform's loudness target. Powered by AI and professional open-source audio tools.

Yes. Unlimited tracks, WAV and MP3 downloads, no watermark, no account required, no trial, no credit card. We don't run a paid tier. The site is mixmasterai.co and it stays free.

Most tracks finish in 30 to 60 seconds. A 3 minute song typically takes about 45 seconds from upload to finished download.

WAV, MP3, FLAC, M4A, AIFF, and AIF. The engine converts everything to 44.1 kHz, 24 bit stereo WAV internally before processing, so the source format doesn't affect quality.

50 MB per track. That covers a full length 24 bit WAV for nearly any song under about 8 minutes.

Yes, and we go further than any other platform for AI music. When you upload a Suno, Udio, Mureka, or ElevenLabs track, select that platform in the AI Source picker before mastering. Our Humanizer runs first and removes the specific codec artifacts each platform imprints: the 400-800Hz mud, the 5-8kHz fizz, smeared transients, artificial dynamics, and over-wide stereo. After humanizing, the full mastering pipeline runs on top. The result sounds like a real recording, not an AI export. No other free mastering platform does this.