Volume Booster
Make audio or video louder or quieter by changing the volume level.
Private by design: your files are processed inside your browser and are never uploaded to our server.
About Volume Booster
Make quiet recordings, lectures and videos louder, or tone down loud ones. A built-in limiter helps prevent distortion.
How to use Volume Booster
- Step 1Select your file(s) or drag and drop them into the box.
- Step 2Choose the Volume Booster settings you want.
- Step 3Click the button and download your result.
Questions & answers
How loud can I make it?
Up to 400%. Above 200% quiet recordings may start to sound noisy.
Is Volume Booster free?
Yes. Every tool on this site is free to use, with no signup, no watermark and no daily limit.
Are my files uploaded to a server?
No. Your files are processed inside your own browser on your device. They are never uploaded, so nobody else can see them.
Is there a file size limit?
There is no fixed limit. Because processing happens on your device, very large files depend on your phone or computer memory. Most files up to a few hundred MB work fine.
Why does it take a moment the first time?
The video engine (about 30 MB) downloads once the first time you use a video or audio tool. After that your browser keeps it, so next time it starts quickly.
Does it work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.