Increase Audio Volume
Raise or Lower Volume by an Exact Amount
Need to use Increase Audio Volume right now?
For audio with inconsistent volume throughout, the Audio Normalizer tool is generally the better fit.
Drop an audio file, or click to browse
Processed locally in your browser — never uploaded
Boosting too far can cause audible clipping/distortion if the source is already close to peak volume — if that happens, try a smaller gain or use the Audio Normalizer instead.
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
Who uses this tool?
About Increase Audio Volume
A recording that came out too quiet — a phone-recorded voice memo, a video's audio track picked up from a distant microphone — often just needs a straightforward volume boost rather than any more sophisticated processing. This tool applies a precise gain adjustment in decibels, the standard unit for measuring relative loudness in audio engineering.
A real FFmpeg build compiled to WebAssembly applies the gain entirely inside your browser using FFmpeg's volume filter, which multiplies the audio signal by a factor calculated from your chosen decibel value — positive values boost volume, negative values reduce it, with 0dB leaving the audio unchanged.
Boosting volume too aggressively on audio that's already close to peak level can cause audible clipping — a harsh, distorted sound that happens when the signal exceeds the maximum representable level. This is a genuine risk with any flat gain boost, not a flaw specific to this tool, and it's worth previewing the result and backing off the gain if distortion appears.
For audio with inconsistent volume throughout (quiet in some parts, loud in others) rather than uniformly too quiet, the Audio Normalizer tool's loudness-based approach will generally produce a more even, professional-sounding result than a flat gain boost applied here.
How it works
- Upload your audio file. The file loads into the browser-based FFmpeg engine.
- Set the gain in decibels. Positive boosts volume, negative reduces it.
- Apply and download. The adjusted audio, re-encoded as MP3.
Examples
Boosting a quiet voice recording
Input
quiet voice memo, +8dB gain
Output
a noticeably louder MP3 file