LUFS loudness meter — check and normalize for Spotify, YouTube and Apple Music
Measure the integrated loudness, true peak and dynamic range of your track, see what Spotify, YouTube and Apple Music will do to it, and normalize it in one click.
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What streaming services will do
Normalize
The gain is limited so the true peak stays under −1 dBTP. To reach the target, use a limiter when mastering.
How it works
Add a file and wait a few seconds. You get the integrated loudness (LUFS), true peak (dBTP) and loudness range, plus how each streaming service will turn your track up or down. To match a service, pick a target and press Download — the track is normalized on your device with the peak kept under −1 dBTP.
What LUFS should my song be for Spotify?
Spotify plays music at about −14 LUFS. A louder master is simply turned down, so mastering much louder gains nothing and costs dynamics. Around −14 to −9 LUFS with a true peak under −1 dBTP is a safe range.
What is true peak and why −1 dBTP?
True peak is the highest level of the real waveform between samples. When a service converts your file to its own format, peaks above −1 dBTP can distort, so most platforms recommend keeping them below that.
Are my files uploaded anywhere?
No. Everything is processed by your own browser. Your music is not sent to our server or anyone else, so the tool is private and works even with very large files.