Measure integrated LUFS, true peak, loudness range, and target level differences for music, podcasts, video, and broadcast audio.
Drop an audio file here or choose a source to measure loudness or import from:
A LUFS meter measures perceived program loudness rather than only the highest digital sample. This online loudness meter scans the complete file and reports Integrated LUFS, momentary and short-term loudness, Loudness Range, and True Peak.
Use it as a LUFS analyzer or loudness checker before releasing music, podcasts, video soundtracks, or broadcast programs. The analysis measures the source without changing or normalizing it.
Get one gated loudness value for the complete program and compare it directly with the selected reference line.
Inspect fast 400 ms changes and broader three-second loudness movement on the history chart.
Use the value in LU to understand the measured variation between quieter and louder sections.
Check estimated inter-sample peaks and see a warning above -1 dBTP, where encoding headroom may be limited.
The analyzer scans the complete file because integrated loudness cannot be determined from a short preview.
Choose the mix, master, episode, or video soundtrack you want to evaluate.
Wait for the full-file EBU R128 analysis to finish and populate the chart and metrics.
Compare the result with a named streaming, podcast, general web-video, or broadcast reference while following the final receiver's specification.
Different programs and delivery channels benefit from different loudness decisions.
Compare integrated loudness and true peak with a streaming-oriented reference before release.
Check whether spoken-word episodes are consistent and whether peaks leave sensible headroom.
Measure the complete soundtrack rather than judging level from a few loud scenes.
Use the -23 LUFS reference as a comparison point while following the exact requirements of the receiving broadcaster.
Integrated LUFS, LRA, true peak, and the history curve answer different questions.
Platform targets are useful references, but genre, program type, and delivery specification still matter.
A mix can hit the final target while still containing sections that feel unexpectedly quiet or loud.
Lossy encoding and downstream processing can create peaks above sample peak, so the dBTP result matters.
LUFS estimates perceived program loudness, dBFS describes digital signal level, RMS summarizes signal energy, and True Peak estimates reconstructed peaks between samples.
These are convenient comparison presets, not a replacement for a platform's current delivery documentation.
| Preset | Target | Typical use |
|---|---|---|
| Spotify normal playback | -14 LUFS | Spotify loudness-normalization comparison |
| Podcast stereo reference | -16 LUFS | Episode and voice-program reference |
| General web-video reference | -18 LUFS | Convenient comparison only; not a universal platform standard |
| EBU R128 broadcast | -23 LUFS | EBU-style broadcast comparison |
Always confirm the exact current requirement for the platform, broadcaster, client, or distributor receiving the file.
There is no single correct LUFS value for every release. Use the destination's current specification, then consider genre, dynamics, speech consistency, and true-peak headroom instead of mastering every file to one number.
It is a gated loudness measurement that summarizes the perceived loudness of the complete program in one value.
Momentary LUFS follows fast changes over about 400 ms, short-term LUFS summarizes roughly three seconds, and integrated LUFS combines the gated loudness of the complete program.
Loudness Range estimates the variation between quieter and louder sections and is reported in LU.
True peak estimates inter-sample peaks that can occur during conversion or playback reconstruction and is reported in dBTP.
LUFS estimates perceived loudness, dBFS describes level relative to the digital maximum, and RMS represents average signal energy. They describe different properties and should not be treated as interchangeable.
The warning draws attention to reduced headroom for lossy encoding and downstream processing. The exact ceiling still depends on the delivery specification.
No. It measures the source and shows a comparison gain value, but it does not modify or export normalized audio.
Integrated loudness depends on the gated level of the complete program. A short preview can miss quiet sections, loud sections, or pauses and produce a misleading result.
Differences can come from channel handling, gating, true-peak oversampling, file decoding, measurement standard, or whether the complete program was analyzed. Compare meters only when their settings and source are the same.
Yes. You can select a supported MP4 file and the browser analyzes its audio track without changing the video.
No. File decoding and loudness analysis run locally in your browser, so the selected media does not need to be uploaded for measurement.
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