Audio Volume Booster
Boost the volume of quiet audio files to make them clear and loud instantly. Free, no signup, works in your browser.
Everything runs inside your browser — your file is never uploaded to a server.
First run downloads the media engine (~30 MB) once, then it stays cached.
About this tool
Quiet recordings from a distant microphone, a low-gain voice memo, or a video's original audio track can be frustrating to listen to, especially on speakers without much power. This tool amplifies audio loudness using FFmpeg's volume filter, letting you choose a boost amount measured in decibels or as a percentage multiplier to bring faint audio up to a comfortable listening level. It works entirely inside your browser via WebAssembly, so there's no upload delay and no privacy concern with sending recordings to a third-party server. You can preview the boosted result before committing, watch for clipping distortion if you push the gain too far, and export the louder file ready for playback on any device. It's a fast fix for recordings that were captured too quietly the first time.
How to use this tool
1. Upload your quiet audio file
Select the audio you want to make louder from your device.
2. Choose a boost level
Pick a decibel or percentage increase for the volume.
3. Apply the boost
Click process and FFmpeg amplifies the audio locally in your browser.
4. Download the louder file
Save the boosted audio to your device ready for playback.
Why use this tool
Recordings that come out too quiet are common with budget microphones, distant recording setups, or videos with weak native audio. Rather than relying on your playback device's volume knob to compensate, this tool permanently raises the audio's amplitude so it's clear and comfortable everywhere it's played. Because it runs locally, you can experiment with different boost levels instantly without waiting on repeated uploads.
Tips & best practices
- Boost gradually and preview often; pushing volume too high causes harsh, unpleasant clipping distortion.
- If different parts of the track have very different volumes, try the normalizer first for more even results.
- Export as WAV for further editing, or MP3 for a smaller final file ready to share.
Common use cases
- Boosting a quiet voice memo recorded in a noisy environment.
- Raising the volume of a video's extracted audio track before republishing.
- Making a soft-spoken podcast recording easier to hear on phone speakers.
- Amplifying a faint field recording for a documentary project.
- Increasing the loudness of an old cassette or vinyl digitization before archiving.
Frequently asked questions
How much can I boost the volume?
You can typically boost several decibels or apply a multiplier of 2x, 3x, or more, though very high boosts risk clipping distortion.
Will boosting introduce distortion?
If the original audio has peaks close to maximum, boosting too aggressively can clip; the tool lets you preview before exporting to check for this.
Can I boost only quiet sections and leave loud parts alone?
This tool applies a uniform boost; for uneven volume, try the audio normalizer instead which balances levels automatically.
What file formats does it support?
Common formats like MP3, WAV, M4A, and OGG are supported for both upload and export.
Is my file uploaded to a server for processing?
No, the entire volume boost happens locally in your browser.
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