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Professional Audio Loudness Analyzer

Measure programme loudness and peak levels using a standards-based ITU-R BS.1770-5 / EBU R128 workflow.

The audio is decoded and measured locally in your browser. It is never uploaded.

This is not an RMS-to-LUFS estimate. The engine applies K-weighting, 400 ms blocks with 75% overlap, absolute and relative gating, 3-second short-term windows, EBU Loudness Range analysis and 4× polyphase FIR True Peak measurement.

Results include Integrated LUFS, Momentary and Short-Term maxima, LRA, True Peak, Sample Peak, RMS, crest factor, clipping and stereo correlation.

Loudness QA

Analyze one audio master

BS.1770-5 / EBU R128

Drag & drop an audio file here

WAV, AIFF, FLAC, MP3, AAC, M4A, OGG and Opus are accepted when supported by the browser decoder.