Volume Booster
Make quiet audio louder — boost up to 400 %, normalise to full scale, and stop clipping with a built-in limiter.
How to Boost Audio Volume in 3 Steps
Drop an audio file
Drag any MP3, WAV, M4A, OGG or FLAC onto the left pane. The source badge shows its current peak level in dB.
Choose how loud
Keep Normalise to lift the loudest point exactly to 0 dB without distortion, or switch to Fixed boost and pick 10–400 %. Leave the limiter on when boosting hard.
Boost and download
Click Boost volume. The output badge shows the new peak, and the result plays on the right.
Volume Booster — Frequently Asked Questions
Is my audio uploaded anywhere?
No. The file is decoded by your browser's Web Audio engine, processed on your device and encoded to MP3 or WAV with an open-source encoder running in the page. Nothing is sent to a server.
What does Normalise do?
It measures the loudest sample and raises the whole file so that peak sits at 0 dBFS (full scale). It is the maximum clean boost — nothing is clipped — but a file with one loud click will barely change; use Fixed boost with the limiter for those.
Will boosting distort my audio?
Only if peaks exceed full scale with the limiter off. The limiter (a fast compressor at −1 dB) squashes anything above that, so 300 % on a quiet recording stays clean. The output badge shows the final peak.
Which formats can I open and save?
Open anything your browser plays: MP3, WAV, M4A/AAC, OGG, Opus, FLAC and WebM audio. Save as MP3 (128, 192 or 320 kbps) or lossless 16-bit WAV. Pick the format under Settings before you run the tool.
Does it lose quality?
Decoding to raw samples is lossless; the only loss is the final MP3 encode, and 192–320 kbps is transparent for most listeners. Choose WAV if you plan to edit the result again — re-encoding MP3 twice stacks artefacts.