Consistent, controlled volume

Audio Normalizer

Upload an audio file, choose a target peak level, and this tool calculates and applies exactly the gain needed to reach it. Preview and download the normalized result as a WAV.

Upload an audio file to analyze its level here.
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Private by design

Your audio file is analyzed and adjusted locally. Nothing is uploaded to a server.

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Instant in the browser

Peak and RMS detection and gain calculation run with the Web Audio API in a moment.

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Always free

Normalize as many files as you like, with no account, watermark or usage limit.

How to use the audio normalizer

Normalizing brings a quiet recording up to a consistent, usable volume, or pulls back a file that is close to clipping, without changing its internal dynamics.

  1. Upload your audioChoose a file. It decodes in your browser and its waveform is drawn to a canvas.
  2. Set a target peakEnter the target peak level in dB, then press Analyze & normalize.
  3. Review and downloadCheck the detected peak, RMS and applied gain, preview the result, then download it as a WAV.

How does peak normalization work?

This tool scans every sample in your file to find the single loudest peak, converts it to decibels, and works out the exact linear gain multiplier needed to move that peak to your chosen target.

Finding the peak

The absolute value of every sample across every channel is checked, and the highest value found becomes the original peak level.

Calculating gain

The gain is the ratio between your target level and the detected peak, converted from decibels to a linear multiplier applied to every sample.

RMS for context

Alongside peak level, the tool reports RMS, a rough measure of average loudness, which helps explain how "hot" or "quiet" the file feels overall.

One gain for the whole file

Unlike compression, normalization applies a single constant gain across the entire file, so relative loudness differences between sections are preserved.

Normalizer FAQ

What does normalizing audio mean?

Normalizing applies a single, constant gain adjustment to an entire file so that its loudest peak reaches a specific target level, without changing the relative dynamics of the recording.

What target level should I use?

A common target is -1 dB peak, which raises the volume close to the maximum while leaving a small safety margin below 0 dB to avoid clipping. You can adjust the target to any value that suits your needs.

Is peak normalization the same as loudness normalization?

No. Peak normalization matches the single loudest sample to a target level. Loudness normalization measures perceived average loudness. This tool reports both peak and RMS level, but normalizes based on the peak.

What audio formats can I upload?

Any format your browser can decode, including MP3, WAV, M4A and OGG. The normalized result is exported as a WAV file.

Is my audio file uploaded to a server?

No. Analysis and gain adjustment happen entirely in your browser using the Web Audio API. Your file never leaves your device.

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