Professional Audio Mastering
Free, unlimited mastering that runs entirely in your browser — measured to streaming loudness standards, with nothing uploaded
Drop your track here or click to browse
WAV, MP3, FLAC, AIFF supported
Measured Loudness
Gated ITU-R BS.1770 / EBU R128 metering sets your track to its LUFS target, so every master lands at a consistent level
True-Peak Limiting
A look-ahead limiter holds the -1 dBTP ceiling using 4x oversampled true-peak detection, so nothing clips after encoding
Presets and Genres
Five tonal presets plus 23 genre targets, or set tone, dynamics and loudness yourself in advanced mode
Leave Headroom
Keep peaks around -3 to -10 dBFS in your mix. Avoid heavy compression on the master bus before mastering.
Check Against Released Songs
Play your master next to professionally released songs in the same genre, at the same volume, to hear whether it sits comfortably alongside them.
Optimize for Streaming
Target -14 LUFS for Spotify, -16 LUFS for Apple Music. Set True Peak ceiling to -1.0 dBTP to prevent clipping.
Test on Multiple Systems
Listen to your master on car speakers, earbuds, and computer speakers to ensure it translates well everywhere.
Start with Quality Mixes
Ensure your mix is balanced before mastering. Mastering enhances, it doesn't fix poor mixes.
Choose the Right Style
Clean for a faithful -14 LUFS master, Warm for vintage vibes, Bright for air and clarity, Punchy for club and hip-hop energy, Loud when the release has to compete at -7 LUFS.