Hear the difference.

Upload a song, master it, compare original and finished waveforms. No complicated plugin controls.

Online Pro uses an FFmpeg processing server for spectral noise reduction, EQ, compression, and measured loudness/true-peak mastering. Offline Basic uses the device’s Web Audio API; it has a lighter effect chain. Neither mode independently isolates a singer, performs Auto-Tune, or guarantees a major-label mix from a single finished MP3. Online files expire automatically after 24 hours. Only upload audio you have permission to process.