Free Loudness Checker

Drop a master. Get integrated LUFS, true peak, loudness range, and exactly what Spotify, Apple Music and YouTube will do to it. Nothing is stored.

Choose a file or drag it here
WAV, AIFF, FLAC, MP3, M4A · up to 80 MB · measured in about 5 seconds

Compare against your genre:

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Integrated LUFS

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True peak dBTP

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Loudness range LU

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Short-term max LUFS

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Crest factor dB

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Clipped samples

What each platform will do to it

Platform	Normalizes to	Gain applied	Meaning

Platform targets are the published defaults (Spotify −14, Apple Music −16, YouTube −14, Amazon −14, Tidal −14, Deezer −15 LUFS). A negative gain means the platform turns your master down; you paid for loudness nobody hears. Spotify does not turn quiet masters up past their true peak, so a quiet, peaky master stays quiet.

Against your genre

Genre medians and middle-50% ranges come from our 314,876-track loudness study. Same pipeline, same numbers.

Want the whole picture?

Loudness is one lever. The full Sonic Analyzer scan measures tonal balance, dynamics and stereo image against the tracks in your tier and genre that are actually converting listeners into fans, and tells you which lever is dragging.

Run the full scan

How it measures

Whole file, both channels, ITU-R BS.1770-4 K-weighting with gating (integrated). Short-term is a 3-second window, loudness range is the 95th minus 10th percentile of gated short-term blocks, true peak is measured at 4× oversampling. This is the same standard the streaming platforms use for normalization, so the numbers you see here are the numbers they see.