audio analyzer
Check loudness in LUFS, real quality, file info and the spectrogram of any track, free, in your browser.
one drop, everything about your audio
Drop a song, a beat or a master once and switch between four views of the same file. Nothing is uploaded: the analysis runs on your device.
loudness: a LUFS meter online
Integrated loudness, true peak and loudness range to the ITU BS.1770 standard, compared with minus 14 LUFS for Spotify and YouTube and minus 16 for Apple Music. More in the loudness checker.
quality: is it really 320 or lossless
Finds where the spectrum really stops and names the likely source bitrate, so a fake 320 kbps mp3 or an mp3 dressed up as FLAC shows itself. More in the audio quality checker.
info: audio file details and tags
Container, codec, sample rate, bit depth, bitrate, channels, length, every tag and the embedded artwork, plus the real peak level and DC offset. More in the audio file inspector.
spectrogram: see the sound
A log-frequency spectrogram or a clean waveform of the whole track, downloadable as a high resolution PNG. More in the spectrogram maker.
common questions
what does the audio analyzer check?
Four things from one drop: loudness (integrated LUFS, true peak and loudness range against Spotify, Apple Music and YouTube targets), quality (where the spectrum really stops, to catch fake 320 kbps mp3s and fake FLACs), file info (codec, sample rate, bit depth, bitrate, tags and artwork) and a spectrogram or waveform you can download as a PNG.
is my audio uploaded anywhere?
No. The file is decoded and measured in your browser, on your own device. Nothing is sent to a server, so it works for unreleased masters too.
how do I check the LUFS of my song online?
Drop the track in and open Loudness. You get the integrated LUFS measured to the ITU BS.1770 standard, the true peak in dBTP and the loudness range, each streaming target marked on target, too loud or too quiet.
how can I tell if an audio file is really high quality?
Open Quality. A real 320 kbps mp3 or a true lossless file keeps energy up to 20 kHz or beyond; a file whose spectrum ends in a hard cliff at 16 kHz was a 128 kbps mp3 at some point, whatever its label says. The plot and the spectrogram both show the cliff.
which formats can I analyze?
mp3, wav, flac, m4a, aac, ogg, opus and aiff, plus the audio inside mp4, mov and webm video. Files up to 300 MB.