Audio Volume Booster & Reducer

Boost quiet audio or reduce loud audio from -20 dB to +20 dB. 100 % browser-based.

Your audio stays on your device. Processing happens locally in your browser.

Drag & drop an audio file

or click to browse — MP3, WAV, M4A, AAC, OGG, FLAC

What is this tool? Audio Volume Booster & Reducer?

Voice notes that sound great on your phone but tinny on someone else's laptop, podcasts that vary in level between guests, lectures recorded too quietly, all common problems. The volume changer applies a constant gain (in decibels) to every sample of your audio file, in your browser. ±20 dB is the practical limit before clipping becomes audible.

How do you use this tool? Audio Volume Booster & Reducer

  1. Upload audio, Drop an MP3, WAV, M4A or other audio file.
  2. Set the gain, +6 dB is "noticeably louder", +10 dB is "much louder". -6 dB roughly halves the volume. Try small steps first.
  3. Apply and preview, Listen to the result before downloading.
  4. Download, Save the boosted/reduced version as a WAV.

Common Use Cases

Raise quiet voice recordings

Increase gain on interviews, voice notes, or lectures that were captured at a low level.

Reduce overly loud clips

Lower an audio file before combining it with other media or sharing it.

Balance a group of assets

Bring several clips closer to a consistent perceived level before editing or presentation.

Prepare notification sounds

Adjust alerts and interface audio so they are audible without being startling.

Why is this tool useful?

Gain control in decibels

Apply a measurable change rather than guessing with an arbitrary percentage.

Immediate listening check

Preview the adjusted level before committing to an export.

Useful correction without a full editor

Handle a straightforward level change quickly when compression and mixing are not required.

Best Practices

  • ✓ Increase gain gradually and listen for clipping, crackle, or flattened peaks after each change.
  • ✓ Compare perceived loudness, not only peak amplitude. A short peak can limit gain even when most of the recording remains quiet.
  • ✓ Use headphones and speakers at a moderate reference volume when checking the result.
  • ✓ For large level differences within one file, use compression or automation in an audio editor rather than one global gain value.
  • ✓ Keep the original file and avoid repeated lossy exports.

Practical examples

Boost a quiet voice recording
Input
Podcast clip, gain: +6 dB.
Output
Audio with approximately twice the signal amplitude. Loud peaks can clip, so preview the result before downloading.
Reduce an overly loud effect
Input
Sound effect, gain: -9 dB.
Output
A quieter file with the same duration. The operation changes level, not background noise or dynamic range.

Frequently Asked Questions

Yes. Going beyond about +12 dB on already-loud audio causes clipping (hard distortion). Start small.

This tool applies a constant gain. For peak/LUFS normalisation, use a desktop DAW.

No. The tool creates a new result in the browser. Your original remains unchanged unless you overwrite it after downloading.

The tool does not add ownership restrictions to your output. You remain responsible for rights to the source material and for complying with third party licenses.

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