LUFS meter

Integrated loudness, true peak, range and a reference.

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How it works

Measured per ITU-R BS.1770 / EBU R128, with absolute and relative gating, as Spotify and YouTube do.
True peak is estimated with 4× oversampling: it catches peaks that fall between samples.
Platforms turn loud songs down: mastering far above their target doesn't make you louder, only more squashed.

Everything happens on this device: no file is uploaded and nothing leaves the browser.