Free Audio Normalizer

An audio normalizer adjusts a recording so its overall loudness matches a target. This one measures loudness in LUFS and uses FFmpeg’s loudnorm filter to reach the value you set. It’s useful when clips from different sources sound too quiet or too loud.

1. Click Choose files and select your recording. 2. Enter a value in Target loudness (LUFS), such as -16. 3. Click Process audio. 4. Compare the MP3 with the original and click Download.

Use -16 LUFS for podcasts, voiceovers and other spoken content. Music for streaming is often mastered around -14 LUFS, and broadcast uses -23 or -24 LUFS. When matching several clips, give them all the same target.

No. The loudness analysis and processing happen in FFmpeg inside your browser. Your file never goes to SocQ; only the FFmpeg engine is downloaded once from a public CDN and cached.

Yes. The normalizer is free, adds nothing to your audio and has no daily limit. Each file can be up to 100 MB and 10 minutes long.

You get an MP3 at 192 kbps, 44.1 kHz, stereo, named normalize-audio.mp3. If your editor needs WAV, convert the MP3 with the audio converter afterward.

The filter works in a single pass, so the result lands near the target rather than exactly on it. Very short clips, near-silent recordings and files with sharp peaks can end up further away. Check with a loudness meter if you need an exact figure.

Targets must be numbers between -30 and -5 LUFS. Remember the minus sign: typing 16 instead of -16 is out of range. Errors also appear for files over 10 minutes, over 100 MB or without audio.

Yes, current Safari on iPhone and Chrome on Android can run it. Loudness processing is demanding, so expect a longer wait on phones, and use a computer for files close to 10 minutes.

No. Raising a quiet recording makes its noise louder too. Clean steady hiss first with the background noise remover, then normalize the cleaned file.