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Free online music mastering

Master Suno, Udio and recorded songs in your browser for free. Hear your original and master side by side, then download the 24-bit WAV with membership.

What the AI mastering chain does

  1. 1

    Measure

    Loudness is measured as K-weighted, gated integrated LUFS to ITU-R BS.1770, the same method the streaming platforms use when they normalise your track. Nothing is guessed from peak level.

  2. 2

    Shape

    Genre-aware EQ and multiband compression handle the tonal balance, then a de-harsh stage measures the 5 to 10 kHz range and cuts only what is actually there. AI exports usually need that; a live recording usually does not.

  3. 3

    Level

    A look-ahead limiter works toward your chosen loudness while protecting peaks. Peak protection can keep the result quieter than the target. Lossy encoding can change peaks, so check the delivered file too.

  4. 4

    Compare

    Switch between the original and mastered audio. Enable Match loudness for a fairer comparison, then listen for vocal clarity, bass definition and preserved transients rather than volume alone.

Mastering target presets

These are starting settings in MixMasterAI, not platform certification or mandatory upload requirements. Final loudness depends on the source and peak protection. A stereo export is not a Dolby Atmos deliverable.

PlatformIntegrated loudnessTrue peak
Spotify-14 LUFS−2 dBTP
Apple Music-16 LUFS−2 dBTP
YouTube-14 LUFS−2 dBTP
SoundCloud-9 LUFS−2 dBTP
TikTok-13 LUFS−2 dBTP
Amazon Music-14 LUFS−2 dBTP
Tidal-14 LUFS−2 dBTP
Dolby Atmos-18 LUFS−2 dBTP

Questions about mastering online

What do I get before paying?

You can master your track and compare it against the original before paying. Downloading the finished WAV or MP3 needs a membership at EUR 4.99 a month, billed monthly, cancel any time.

When do I need an account?

Only to download. Upload a track, master it, and compare it against your original first.

Does my music get uploaded to a server?

No. Mastering runs in your browser using the Web Audio API, so the audio stays on your device. A file only leaves your machine if you choose to save a finished master to your library.

Does it work on Suno and Udio tracks?

Yes. Start with the best available export from Suno or Udio. If the source has harshness, hiss or unstable vocals, preview repair before mastering. Processing can reduce some problems, but cannot guarantee the recovery of missing or distorted musical detail.

What loudness should I master to?

Choose a starting preset, then judge the dynamics and tone at matched listening levels. These are MixMasterAI settings, not mandatory delivery specifications. Playback normalization varies by service and listener settings. Do not sacrifice punch just to reach a number.

What formats can I export?

24-bit WAV and 320 kbps MP3, once a membership is active.

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