Free Audio Volume Booster & Normalizer
Amplify quiet audio files, boost volume, or normalize peaks to 0 dBFS without distortion.
- 100% free
- Files stay on your device
- No sign-up, no watermark
Choose files or drag & drop
Upload MP3, WAV, OGG, M4A, WEBM, FLAC, AAC files to convert locally inside your browser.
What is Audio Volume Booster & Normalizer?
Fix quiet recordings where speech is barely audible. Our Web Audio gain node amplifier boosts volume levels cleanly and features soft-knee peak limiting to prevent harsh digital distortion.
How to use Audio Volume Booster & Normalizer
- 1
Add your file or input
Choose a supported file, drag it onto the upload area, or type/paste the data this tool works with.
- 2
Adjust the options
Pick the output format, quality, size or other settings the tool offers. Defaults work well for most files.
- 3
Process and download
Run the tool and save the result. Processing happens in your browser, so nothing is uploaded to a server.
Frequently asked questions
How does peak limiting prevent distortion when boosting volume?
Our volume booster employs dynamic range compression and soft limiting, preventing boosted acoustic waves from flatlining against the 0dB digital ceiling and causing harsh clicks.
By how much can I boost quiet audio?
You can amplify sound levels from +1dB up to +20dB (a 300% increase in acoustic power) to bring quiet whispering or distant microphones up to standard listening levels.
Can I also use this tool to lower the volume of overly loud audio?
Yes. The gain slider can attenuate audio downward to prevent deafening playback or match quieter tracks.
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