Change Volume
Audio Processing LaboratoryNormalize, boost, or reduce an audio track's loudness.
What is Change Volume?
Change Volume raises or lowers the loudness of an audio file and saves the adjusted version, all inside your browser. Drop in an MP3, WAV, M4A, or OGG file and move a single slider from 0% up to 400% of the original level. The gain is applied with the Web Audio API on your device, so your file is never uploaded.
How to use Change Volume
Add your audio
Drag a file onto the drop zone or click to browse. The tool decodes it and shows a playable preview alongside its name, size, and duration.
Set the volume
Drag the Volume slider between 0% and 400%. 100% keeps the original level, values below reduce it, and values above amplify it.
Watch for clipping
Boosting well above 100% can push loud peaks past the maximum and cause distortion. Nudge the level down if the result sounds harsh.
Apply and download
Click Apply & download to render the new level and save it. All processing happens locally, so nothing is uploaded.
Common uses
- Boost a quiet recording that is hard to hear
- Turn down a clip that is uncomfortably loud
- Even out the level of a voice memo before sharing
- Amplify a faint interview or lecture capture
- Reduce a backing track so it sits under narration
- Rescue audio recorded too far from the microphone
Why choose FreeTools
100% private
Your files are processed inside your browser and are never uploaded to a server.
Free, no account
No sign-up, no watermark, no paywalled “premium” tier. Just open a tool and use it.
Instant
No upload, no queue, no server round-trip — work starts the moment you drop a file.
Runs in your browser
Built on open web standards. Works on any modern desktop browser, nothing to install.
No upload size caps
Nothing leaves your device, so there’s no server file-size limit — only your machine’s memory.
Yours to keep
Results download straight to your device in clean, standard file formats.