How to Use Volume Booster
- Upload an audio or video file — supports MP3, WAV, AAC, FLAC, OGG, and video formats
- Drag the volume slider to increase (above 100%) or decrease (below 100%)
- Choose the output audio format
- Click Process and download the volume-adjusted audio
Features
- Boost volume up to 300% for quiet recordings
- Anti-distortion limiter stops boosted peaks from clipping into crackle
- Make a video louder without re-encoding — the picture is copied untouched
- Decrease volume for loud audio files
- Works on MP3, WAV, AAC, OGG, FLAC and all common video formats
- 100% private — files never leave your browser
Quick Facts
- The slider runs from 0% to 300%. Doubling the amplitude to 200% is a gain of about 6 dB, and 300% is about 9.5 dB. Source
- With the limiter on, peaks are held at 0.97 of full scale - about 0.26 dB of headroom - so a boosted passage is pulled back instead of clipping.
- When the output stays a video format the picture is copied through rather than re-encoded, so the video stream loses 0 quality and only the audio track is rewritten.
Frequently Asked Questions
- How do I make audio louder?
- Upload your audio file and drag the volume slider above 100%. At 200%, the audio is twice as loud. Up to 300% is supported.
- Can I reduce the volume of a video?
- Yes, upload any video file and the tool will extract and adjust the audio volume. Drag the slider below 100% to reduce volume.
- Will increasing volume cause distortion?
- Not with the Anti-Distortion Limiter on (the default): it caps peaks just below full scale, so even a 300% boost stays clean — loud passages are gently held back instead of clipping into crackle. Turn the limiter off only if you want the raw boosted signal.
- How do I make an MP3 louder?
- Upload the MP3, drag the volume slider above 100% — 200% is a comfortable double — and click Process. The louder MP3 downloads in seconds; see the dedicated Make MP3 Louder page for that exact workflow.
- Can I make a video louder without losing quality?
- Yes — when you keep a video output format, the video stream is copied bit-for-bit and only the audio track is re-encoded louder. The picture loses zero quality; see Make a Video Louder.
- Is this volume changer free?
- Yes, completely free with no limits. All processing happens locally in your browser using FFmpeg WebAssembly.
- How many decibels is a 200% volume boost?
- About 6 dB. Decibels are logarithmic, so each doubling of amplitude adds roughly 6 dB: 200% is about +6 dB and 300% about +9.5 dB. Halving to 50% is about -6 dB.
- Why does the slider stop at 300%?
- Gain lifts everything equally, so past about three times you are mostly amplifying hiss and room noise along with the voice. If a recording still sounds too quiet at 300%, clean it up first with the AI Audio Denoiser.