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Audio Normalizer

Even out loudness so your audio plays at a consistent, professional level.

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MP3, WAV, FLAC, M4A, OGG

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Free Online Audio Normalizer — Consistent Loudness

Do your tracks feel like a volume roller-coaster — one too quiet to hear, the next so loud you reach for the dial? Our free audio normalizer fixes that by setting every file to the same steady, comfortable loudness. Instead of guessing with a volume slider, it measures the real perceived loudness of your audio and adjusts it to a precise target, so your music, podcast or voiceover plays at a consistent level from start to finish and next to other content.

The key is a modern loudness unit called LUFS (Loudness Units Full Scale), which measures how loud audio actually sounds to human ears rather than just its peak level. The big platforms all aim for a target: Spotify, YouTube and Apple Music sit around -14 LUFS, podcast platforms often use -16, and broadcast TV and radio use -23. By matching the right target, your upload will not be turned down (or pushed around) by the platform, and it will sit naturally alongside professional releases.

This is more than just "make it louder". Simply turning the volume up multiplies everything, including the quiet parts and the loud peaks, and can cause harsh distortion. Normalization is smarter: it looks at the loudness of the whole track and gently raises or lowers it to hit the target, keeping the sound clean and balanced. That makes it ideal for podcasters, musicians, YouTubers and audiobook narrators who want a polished, professional result without owning expensive mastering software.

Under the hood it uses FFmpeg's broadcast-grade loudnorm filter, the same trusted engine the professionals rely on — but it all runs right inside your browser. That means your audio is never uploaded to a server, your work stays private, and there is no sign-up or watermark. Just drop in a file, pick the target for where it is going, and download a clean, level-corrected version.

How it works

1

Drop your file

Choose any audio file — MP3, WAV, FLAC, M4A and more. It is processed locally and never uploaded.

2

Pick a target

Choose the LUFS target for your platform: streaming, podcast or broadcast.

3

Normalize & download

Click normalize and download your level-corrected MP3.

Frequently asked questions

What is LUFS?▾
LUFS (Loudness Units Full Scale) measures the loudness your ears actually perceive, not just the peak level. Streaming services target around -14 LUFS, podcasts often use -16, and broadcast uses -23.
Is this the same as "increase volume"?▾
Not quite. Turning up the volume multiplies everything and can distort. Normalization targets a consistent perceived loudness across the whole track, gently raising or lowering it to hit a precise level.
Which target should I choose?▾
Pick the one that matches where your audio is going: streaming (about -14 LUFS) for Spotify, YouTube and Apple Music; podcast (around -16) for podcast platforms; broadcast (-23) for TV and radio delivery.
Why does my normalized file sound quieter than before?▾
Many tracks are mastered very loud. Streaming targets are deliberately lower, so the platform does not have to turn them down. A quieter, consistent level is exactly what the platforms want and helps your audio sound balanced next to everything else.
Is my file uploaded?▾
No. Normalization runs entirely in your browser using FFmpeg's loudnorm filter, so nothing leaves your device.
What format is the output?▾
The level-corrected file is saved as an MP3, ready to upload, share or publish anywhere.

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