Loudness Normalizer (LUFS)
Match the loudness standard of the platform you are publishing to, and verify the result.
MP3, WAV, M4A, FLAC, OGG, Opus, AIFF, WMA and AMR. Files stay on your device.
How it works
- Choose an audio file.
- Pick a preset (-14, -16 or -23 LUFS) or type a target, and set the true-peak ceiling.
- Check the measured loudness before and after.
- Export and download.
Loudness targets
Streaming and broadcast platforms play audio at a standard loudness. Matching it yourself avoids having your track turned down, or turned up with their limiter.
| Target | Used for |
|---|---|
| -14 LUFS | Music streaming services |
| -16 LUFS | Podcasts and spoken word |
| -23 LUFS | EBU R128 television and radio in Europe |
| -24 LUFS | ATSC A/85 television in the United States |
True peak and the limiter
The ceiling (default -1 dBTP) keeps the reconstructed peaks below a safe level after conversion to lossy formats. If reaching the target would push peaks over it, the tool either limits them or settles for less gain, as you choose. After export the file is measured again, so you see the loudness and true peak you actually got.
Platform specifications change over time. Treat the presets as common starting points and check the current guidance of the service you publish to.
What loudness normalization does not do
It sets the overall level. It does not make quiet passages louder relative to loud ones, remove noise or fix clipping that is already in the file.
Questions
Which LUFS should I use for a podcast?
-16 LUFS is a common choice for stereo podcasts, with a true-peak ceiling of -1 dBTP. Some distributors ask for -19 LUFS mono; type that as a custom target.
Why did my file get quieter?
If the original was louder than the target, the tool turns it down to match. That is the point of loudness normalization.
Is LUFS the same as dB?
A LUFS value is measured in the same logarithmic units, but it is weighted to how people hear and averaged over the whole file, so it differs from a peak or RMS reading.
Can I check loudness without changing the file?
Yes: the Loudness Meter and the Audio Analyzer measure without changing anything.