Choose or drop a file. Measurement runs inside this page only: no upload, no outside requests. WAV / AIFF / MP3 / M4A. Loudness follows ITU-R BS.1770-4; LRA follows EBU Tech 3342.
Streaming reference: Spotify normalizes playback to -14 LUFS.From Spotify for Artists documentation. It changes with settings and over time, so treat it as a guide.
Integrated is the average loudness of the whole track, with near-silent parts left out. Short-term uses the last 3 seconds and momentary the last 400 ms. It shows the peak short-term and peak momentary values separately.
Sample peak is the largest sample value in the file. True peak (dBTP) estimates the waveform peaks between samples, so a file that stays under 0 dBFS as samples can still go over after conversion.
LRA (Loudness Range) is how much the loudness moves within a track, in LU. A small value means steady; a large one means a wide gap between quiet and loud parts.
Audio is weighted with the K-weighting filter of ITU-R BS.1770-4, then gated at an absolute -70 LUFS and a relative -10 LU to get integrated loudness. Everything runs in your browser; the audio never leaves it.
The repository tests check loudness within ±0.1 LU on the six EBU Tech 3341 cases, LRA within ±1 LU on EBU Tech 3342 cases, and true peak within -0.4 / +0.2 dB on Tech 3341 cases.
Spotify normalizes playback to -14 LUFS. For other services, check their published guidance.
What each service officially says: loudness by streaming service.
To turn a track into a 1080×1920 video, see GROOVE METER.