Normalize Audio
Set every file to the same level so they play back evenly, by peak, average or perceived loudness.
MP3, WAV, M4A, FLAC, OGG, Opus, AIFF, WMA and AMR. Files stay on your device.
How it works
- Choose one or more audio files.
- Pick the mode (peak, RMS or LUFS) and the target level.
- Check the measured levels and the result.
- Export and download.
Three ways to normalize
Normalizing applies one fixed gain to a whole file so that a chosen measurement lands on a target. The tool offers three measurements.
- Peak: the loudest sample (or, optionally, the loudest reconstructed true peak) reaches the target, for example -1 dBFS. Good for maximum level without clipping.
- Loudness (LUFS): the integrated loudness over the whole file reaches the target. Best for matching files to each other and to platform standards.
- Average (RMS): the average signal level reaches the target. A simple measure of how strong the signal is, less close to what people hear than LUFS.
Batch and verification
Add several files and they are processed one after another with the same settings. Each file is measured before, normalized, then measured again on the file that was written, so the numbers you see include the effect of the encoder. Results can be downloaded one by one or together as a ZIP.
Peaks, ceilings and limiting
When a loudness or RMS target needs more gain than the peaks allow, you decide what happens. "Limit the peaks" reaches the target by letting a true-peak limiter turn the peaks down; the result can land slightly below the target. "Lower the gain" never touches the sound but stops short of the target.
Normalization changes level only. It does not change the balance between loud and quiet passages; use the compressor for that.
Questions
What is the difference between peak and loudness normalization?
Peak normalization looks at the single loudest moment. Loudness normalization looks at how loud the whole file is perceived to be. Two files with the same peak can differ a lot in loudness.
Does normalizing reduce quality?
The gain is exact. Re-encoding to a lossy format adds one generation of loss; choose WAV or FLAC for none.
Why is the result not exactly my LUFS target?
Limiting, lossy encoding and very short or very quiet files can move the measured value by a fraction of a unit. The table shows the value measured on the exported file.
Can I normalize a whole album consistently?
Each file is normalized on its own. To keep the relative levels of an album, merge the tracks first or use the same fixed gain on each.
Are the files uploaded?
No. Everything runs on your device.