Free LUFS meter online — loudness, true peak and tonal balance
Drop a track and get the numbers a mastering engineer looks at first: integrated LUFS, true peak, loudness range, and how your tonal balance sits against commercial releases. Free, no account, and your file is deleted the moment it is measured.
Drop a track, or click to choose
WAV · FLAC · AIFF · MP3 · OGG — up to 350MB, 15 minutes
Files are analysed in memory and discarded. Nothing is stored or shared.
What the numbers mean
- Integrated LUFS
- The average loudness of the whole track, the number streaming services use. Spotify, YouTube, SoundCloud and TikTok normalize to about −14 LUFS; Apple Music to −16. Commercial releases are usually mastered near −9 to −10 and then turned down on playback.
- True peak (dBTP)
- The highest peak after the file is converted back to analogue, measured with oversampling. Keep it at or below −1 dBTP for lossy encoding (MP3/AAC), otherwise inter-sample peaks can distort.
- Loudness range (LRA)
- How much the loudness varies across the track, in LU. Pop and EDM sit around 4–8 LU; acoustic and classical music is wider.
- PLR
- Peak minus loudness. Around 8–12 dB means a polished, dense master; above 14 dB means there is a lot of headroom left for mastering; below 8 dB means the file is already heavily limited.
- Tonal balance
- Energy in seven bands compared with the measured average of 83 commercial masters. The grey band is the normal range. In our measurements AI tracks are typically thin below 350 Hz and slightly bright above 6 kHz.
FAQ
Is this LUFS meter really free?
Yes. There is no account, no limit and no watermark. The file is analysed in memory and deleted. Mastering is a separate, optional step.
Which LUFS should I aim for?
For streaming, about −14 LUFS integrated with a true peak at −1 dBTP. For a loud file you play locally or hand to a DJ, around −9. Louder than the platform target is turned down on playback and only costs you dynamics.
Does it work with MP3?
Yes. WAV, FLAC, AIFF, MP3 and OGG up to 350 MB and 15 minutes. For the most accurate reading use the WAV you would actually release.
Is this the same measurement as Spotify uses?
It uses the same ITU-R BS.1770 integrated-loudness algorithm. Platforms add their own gating details and album modes, so expect differences of a few tenths of a dB.
Keep reading
LUFS explained: the loudness targets for Spotify, Apple Music, YouTube and TikTok
What LUFS means, the normalization level each platform uses in 2026, and why mastering louder than the target costs you dynamics for nothing.
6 min read
How loud should my master be? Real numbers from 83 commercial releases
Commercial masters measured: where they actually sit in LUFS, why the 'loudness war' is mostly over for streaming, and how to choose a target for your track.
5 min read
How to measure LUFS for free (and what to do with the number)
Three free ways to measure integrated LUFS and true peak, how to read the result, and the targets to compare against for Spotify, Apple Music, YouTube and local playback.
4 min read