Free tool

Audio Normalizer

Adjust your audio's volume to the podcast, music or broadcast LUFS standard. 100% in your browser.

Drag your audio here or click to select

MP3, WAV, OGG, FLAC, M4A, AAC · no artificial size limit

Select audio

Built by

Miguel Ángel Colorado Marin (MACM)

Full-Stack Developer · Guadalajara, España

I develop web apps, digital tools and full projects — from design to deployment.

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The audio normalizer adjusts your file's perceived loudness (measured in LUFS) to a specific standard, instead of just raising or lowering the overall volume. It's the same technique streaming platforms use so every song or episode sounds at a consistent volume relative to each other. Choose the preset for your case: -16 LUFS for podcast (the most common standard for voice), -14 LUFS for music (what Spotify and YouTube Music use) or -23 LUFS for broadcast, the EBU R128 standard used in TV and radio. The process runs with FFmpeg's loudnorm filter, compiled to WebAssembly, entirely in your browser.

Features

  • ✓Podcast, Music and Broadcast (EBU R128) presets
  • ✓Loudness normalization, not just peak
  • ✓Keeps the original format
  • ✓Preview before and after
  • ✓100% in browser, no uploads

How to normalize an audio file's volume?

  1. 1

    Upload your audio

    Drag the file or click to select it.

  2. 2

    Choose the target level

    Podcast (-16 LUFS), Music (-14 LUFS) or Broadcast (-23 LUFS).

  3. 3

    Tap Normalize volume

    FFmpeg analyzes and adjusts the whole audio's loudness.

  4. 4

    Download the result

    Compare it with the original in the player and download it.

Frequently asked questions

What's the difference between normalizing and just raising the volume?

Raising the volume multiplies everything equally. Normalizing (loudnorm) analyzes the perceived loudness of the whole audio and adjusts it more intelligently to the chosen standard, avoiding distortion.

Which preset should I choose?

Podcast (-16 LUFS) for voice and spoken episodes, Music (-14 LUFS) if you're uploading to Spotify or YouTube, Broadcast (-23 LUFS) for TV/radio.

Is my audio uploaded to a server?

No. It's processed with FFmpeg compiled to WebAssembly inside your browser.

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Embed Audio Normalizer on your site

Add Audio Normalizer to any web page with a simple iframe. Free, with attribution to miguelacm.es.

<iframe
  src="https://miguelacm.es/embed/audio-normalizer"
  width="100%"
  height="700"
  frameborder="0"
  title="Audio Normalizer — miguelacm.es"
></iframe>
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