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Audio Booster

Boost and increase audio volume

Click to upload an audio file

1x (normal)5x (max)

About Audio Booster

Audio Booster amplifies an audio file's volume using a simple gain multiplier (1x–5x), processed entirely in your browser via ffmpeg.wasm (WebAssembly) — nothing is uploaded to a server. Output is always encoded as MP3.

How to use Audio Booster

  1. 1Click the upload area and select an audio file.
  2. 2Set your desired boost level using the slider (1x–5x).
  3. 3Click "Boost Audio" — the first use downloads the ffmpeg processing engine, so it may take a moment.
  4. 4Preview the result, then download the boosted MP3.

Frequently Asked Questions

What does the boost actually do?

It applies a straightforward volume/gain multiplier to the whole file via ffmpeg — it's not adaptive loudness normalization, so high boost levels can cause clipping or distortion.

What output format do I get?

Always MP3, regardless of the format you uploaded.

Is Audio Booster free to use?

Yes, it's completely free with no signup required.

Is my file uploaded anywhere?

No. Processing runs entirely in your browser using ffmpeg.wasm — your file is never uploaded to a server.

Tips & Tricks

  • ✓Start around 1.5x–2x and listen for distortion before pushing toward the 5x maximum.
  • ✓The first boost after loading the page can take longer since your browser needs to download the ffmpeg.wasm engine.
  • ✓Keep your original file — a volume boost can't be undone once clipping occurs.
  • ✓If your source is already loud, boosting further usually just adds distortion rather than perceived loudness.