Normalise Audio Volume
Bring an audio file to a standard loudness, so it doesn't need the volume riding up and down.
What it does
Normalise Audio Volume reads the whole document before doing anything, so what comes back is either valid output or a specific error with the position that caused it — not a partially rewritten file.
When you need it
Usually when something has already gone wrong: a config file an application will not load, an API response that has to be read by a human, or an export that has to be checked before it goes anywhere near a database.
Limits and caveats
Key order is preserved as it appears in the input. Very large documents are limited by your device's memory rather than by an upload cap, since the parsing happens locally. Everything happens in your browser, so the file never leaves your device.
How to normalise audio volume
- Drop or choose your MP3 file.
- KIVO processes it instantly — no waiting for uploads.
- Download the result. That's it.
Frequently asked questions
- Is this the same as turning the volume up?
- No, and the difference is the whole point. Turning the volume up scales everything, so a quiet recording with one loud cough stays quiet with a louder cough. This measures perceived loudness across the whole file and brings that to a target, which is what makes a podcast sit at a steady level.
- Which target should I use?
- −16 LUFS for a podcast, −14 for Spotify and YouTube, −23 for European broadcast. If you are unsure, −16 is the safe answer: platforms turn down what is too loud, and never turn up what is too quiet.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.