Drop in a song and this LUFS meter measures how loud it is, the same way streaming services and broadcasters do. You get integrated loudness in LUFS (the whole song, measured to the ITU-R BS.1770 and EBU R128 method), the loudest 3 second stretch (short term max), the loudest 400 ms moment, the loudness range (LRA) and an approximate true peak in dBTP. The result is compared with commonly cited reference levels for streaming, podcasts and broadcast, so you can see how far up or down your master sits. The file is measured in your browser and never uploaded. Readings are free with no sign in; saving the report as a PDF needs a free account and uses no credits.
LUFS stands for Loudness Units relative to Full Scale. It measures loudness the way people hear it, rather than just the highest peak, using the method in ITU-R BS.1770. Streaming services and broadcasters use it to compare and even out the loudness of different tracks.
Drop the audio file onto the meter or click to choose it. It is decoded and measured in your browser, and in a few seconds you see the integrated LUFS, the short term and momentary maximums, the loudness range and the true peak.
The levels people cite most often are around -14 LUFS integrated for most streaming services and about -16 LUFS for some others. These are reference points, not rules, and services change them. Most services turn louder tracks down toward their level, so mastering much louder mainly costs you dynamics.
Integrated loudness is the average over the whole song, with silence and very quiet passages gated out as the standard describes. Short term loudness is measured over 3 second windows and momentary over 400 ms windows; the meter shows the loudest of each.
True peak estimates the highest level the waveform reaches between samples, which can be higher than the highest sample and can clip after conversion to MP3 or AAC. A ceiling of about -1 dBTP is commonly recommended. This meter's true peak uses 4x oversampling and is an approximation, not a certified measurement.
Loudness range describes how much the loudness varies across the song, in LU, following EBU Tech 3342. A heavily compressed track might read 3 to 5 LU, while a dynamic acoustic or orchestral piece can read well above 10.
No. The file is decoded and measured in your browser and never leaves your device. That also means very long files depend on your device's memory; files up to 100 MB and 30 minutes are supported.
Yes. The readings are free with no sign in. Saving the report as a PDF needs a free account and uses no credits. For a full streaming readiness report with stereo width and balance, try Release Ready Check, and to raise a quiet master try AI Mastering.