Audio Test Kit

LUFS Meter

LUFS Meter

Measure integrated loudness, loudness range, and true peak — and check whether your file lands on YouTube, Spotify, Apple Music, podcast, and broadcast targets.

Drop audio or video here

or click to choose a file

Your file stays in your browser. Nothing is uploaded.

How to use

  1. Drag a file in, or click the dropzone to choose one.
  2. Click Analyze. We run a single ITU-R BS.1770 pass to measure integrated loudness, LRA, and true peak — typical 5-minute files take under 30 seconds.
  3. Read the verdict for each platform target. Copy the result if you need to share it.

What this checks

Integrated loudness is the program-level LUFS value (BS.1770 gated) that streaming platforms normalize against. True peak is the oversampled dBTP value — peaks above -1 dBTP can clip after re-encode.

Verdict per target compares your integrated LUFS against the platform reference (YouTube/Spotify -14, Apple Music/podcast -16, broadcast -23) and downgrades on a high true peak. Warn means audible drift; fail means re-render before upload.

Privacy

Your file stays in your browser. Loudness analysis runs locally with ffmpeg.wasm. Nothing is uploaded.

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