No Upload Studio
What is LUFS?
A measure of how loud a recording sounds as a whole, the way people hear it, rather than how high its loudest peak goes. Podcast apps and streaming services use it to even out the volume from one file to the next.
Normalize Audio Loudness
Make a recording louder, or quieter, to the level podcast apps and YouTube expect, without distortion. It all happens in your browser, so the file never leaves your device.
How to Normalize Audio Loudness
- Open your file in the audio editor and choose the Loudness tool on the left. It measures the file and shows how loud it is now, in LUFS, with its true peak; for a file over 10 minutes, press Measure it first.
- Choose a target: Podcast (−16 LUFS), YouTube and streaming (−14 LUFS) or Custom.
- Press Level to −16 LUFS. The button names the target you chose.
- Play it back, then press the save button at the top right (Save MP3, Save WAV or Save M4A).
Questions
Which level should I choose?
Podcast for podcasts and voice-overs. YouTube and streaming for videos and music you upload: those services turn louder files down to about −14 LUFS anyway. Custom (−30 to −5 LUFS) when a platform asks for something else, such as −23 for broadcast.
Will making it louder distort it?
No. The highest points, between samples too, are held under −1 dBTP, so the sound doesn't clip when it is saved as MP3 or M4A. A recording with very sharp peaks can end up a little under the target; the message under the tool says so.
Can I make only part of it louder?
Yes, with the Volume tool: drag across the waveform to select the part, set the percentage and press Change volume. The Loudness tool always works on the whole file.
Is my audio uploaded?
No. Measuring and levelling run in your browser. The file is read from your device and saved back to it.