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Free Online Audio Volume Gain Multiplier

Volume Booster — Make Audio Louder Online

Increase or reduce audio gain in your browser. High gain can introduce clipping, so preview and use the lowest setting that works.

🔊 Volume Booster

Amplify quiet voice notes, music or recordings up to 300% offline.

Upload Audio to Boost Volume

Why Use mp3cut.in Volume Booster?

Boost up to 300%: Amplify faint vocal notes, lectures, or quiet songs up to 3x original volume.
Adjustable gain: Set a gain level from 50% to 300%, then download the processed WAV file.
Clipping warning: High gain can clip peaks and create distortion, so use the lowest effective setting.
Private Local Processing: Zero uploads — your personal recordings stay 100% private.
125% - Subtle Boost (+2 dB)

Ideal for commercial songs or studio recordings that are slightly quieter than modern streaming master tracks.

150% - Lecture Boost (+3.5 dB)

Recommended for classroom lectures, phone interviews, and zoom call voice recordings with low mic volume.

200% - 300% Maximum Amplification

Use high settings carefully for faint recordings. This tool does not include a limiter, so peaks may clip and sound distorted.

Before you increase gain

Gain raises the level of every part of the clip, including background noise. Start near 125%, listen to the exported WAV file, and increase gradually only when speech or music remains clear. If loud peaks sound harsh, reduce the setting; this tool does not repair clipped source audio or apply automatic loudness normalization.

Related audio tools

Choose a separate tool when your editing task needs more than trimming or format-compatible WAV output.

Frequently Asked Questions (FAQ)

Volume Booster FAQs

Questions about increasing audio loudness and gain.

You can set gain from 50% to 300% (up to 3× the original level) with the slider.
Increasing gain can make peaks clip and distort. Start with a modest setting, listen to the result, and reduce the gain if it sounds harsh.
Mobile microphones often record at lower decibel levels to prevent clipping. Boosting gain by +50% to +100% restores vocal presence.
Yes! Boost as many audio files as you want with no limits, no sign-up, and zero server processing.