# Match the loudness of several audio files

> Drop podcast episodes, songs or voice notes. Each one is set to the same loudness with a true-peak ceiling.

Measure the loudness of many audio files in LUFS, scale each one to the same target, and save them as WAVs or one ZIP. Runs in your browser.

- Tool: [Normalize loudness](https://fixmint.cc/normalize-audio-loudness)
- Category: [Audio & video](https://fixmint.cc/audio-video)
- Fixes: Files at uneven volume
- Runs in the browser: files and text stay on the device, no sign-up, free.

## How to match the loudness of several audio files

1. Drop all the files at once.
2. Pick a target loudness and the true-peak ceiling.
3. Download each file, or all of them as one ZIP.

## Questions

### What is LUFS?

LUFS is a loudness measure that follows how loud sound seems to a listener, not just its highest peak. It is defined in ITU-R BS.1770, and the EBU R128 recommendation uses it with a target of −23 LUFS for broadcast.

### Which target should I use?

Common targets are −14 LUFS, often used for streaming, and −16 LUFS, often used for podcasts. −23 LUFS is the EBU R128 broadcast level. Pick the one your platform or client asks for.

### What does "limited" mean?

Raising some files to the target would push their peaks past the true-peak ceiling. A limiter then turns the loudest peaks down, and the gain is adjusted so the limited file still reaches the target when the ceiling allows it.

### Are my files uploaded?

No. Each file is decoded, measured and saved again in your browser. Nothing is sent anywhere, and the files are kept only while this page is open.

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