Audio Volume Booster
Make quiet audio louder — boost volume up to 800% or reduce it. Works with MP3, WAV, M4A and video files. Free online volume booster, no upload.
How to use Audio Volume Booster
- 1Drop your file into the box above.
- 2Adjust the options.
- 3Download the result — everything happens on your device.
Questions
Is Audio Volume Booster free?
Yes. Audio Volume Booster is 100% free with no limits, no watermark, no sign up and no email required.
Are my files uploaded to a server?
No. Your files are processed entirely inside your browser using JavaScript. They never leave your device, so it is private and works even on slow connections.
Does Audio Volume Booster work on my phone?
Yes. Audio Volume Booster works in any modern browser on iPhone, Android, Windows, Mac, Linux and Chromebook. No app or install needed.
Do I need to create an account?
Never. There is no sign up, no login, no email and no paywall. Just open the page and use it.
Why WAV?
WAV is lossless and every device can play it. Browsers cannot encode MP3 natively, so we output high-quality WAV that you can play or convert anywhere.