Volume Changer
Make audio louder or quieter — free, precise, in your browser.
100% in your browser — nothing is uploaded
Volume Changer
This free volume changer raises or lowers the level of an audio file and can normalise it to a consistent target. Use it when one podcast guest recorded far quieter than the other, when a voiceover is buried under a music bed, when a generated track needs to sit at the same level as the rest of a playlist, or when a file clips and needs pulling back. The tool works in decibels rather than percentages, which is how audio actually behaves: doubling the perceived loudness is roughly a ten-decibel change, not a doubling of the number. Normalising analyses the whole file to find its loudest peak and applies a single gain change so that peak lands exactly where you asked, which raises quiet material without altering the balance inside it. What raising volume cannot do is add information that was never recorded — lifting a very quiet take also lifts its noise floor, hiss and room tone by the same amount. Everything is processed locally in the browser, so nothing is uploaded.
How to use the free volume changer
- 1
Load the file
Drag in an MP3, WAV, M4A or FLAC. It is decoded locally in your browser.
- 2
Set the level
Raise or lower in decibels, or normalise so the loudest peak lands on a target you choose.
- 3
Export the result
Preview, then download at the adjusted level with no watermark and no account.
Made for AI music creators
Matching a generated track to the rest of a playlist, or rescuing a guest who recorded too quietly? Adjust the level here and compress or convert the file without leaving the browser.
Volume Changer: what people search for
Searched as a volume changer, an audio volume booster, a way to increase audio volume online, an mp3 louder tool, an audio normalizer, and as the problem itself — fix quiet recording, "how to make an audio file louder". Worth separating the two operations people conflate: to normalise audio is to scale the whole file so its loudest peak lands at a chosen ceiling, while boosting simply multiplies gain and will clip anything already near the top.
Volume Changer at a glance
- Runs
- Entirely in your browser
- Uploads
- None — files never leave your device
- Account
- Not required
- Cost
- Free, no watermark
- Output
- Lossless WAV where audio is exported
- Works offline
- After the page has loaded
Why it works this way
The volume changer runs on your machine
This free volume changer raises or lowers the level of an audio file and can normalise it to a consistent target. Use it when one podcast guest recorded far quieter than the other, when a voiceover is buried under a music bed, when a generated track needs to sit at the same level as the rest of a playlist, or when a file clips and needs pulling back.
A free volume changer with no signup
Matching a generated track to the rest of a playlist, or rescuing a guest who recorded too quietly? Adjust the level here and compress or convert the file without leaving the browser.
What the volume changer handles
The cases people actually bring to it.
Load it into the volume changer and raise the gain in decibels, or normalise it so the loudest peak lands at a target level. Preview before exporting, because raising a quiet file also raises its noise floor.
It finds the loudest peak in the file and applies one uniform gain change so that peak hits your target. The internal balance is untouched — it is not compression, and it does not make quiet passages louder relative to loud ones.
You have pushed peaks past the maximum the format can represent, which clips them flat. Reduce the gain until the loudest peak sits just below the ceiling, or normalise instead of applying a fixed boost.
Roughly ten decibels for perceived loudness, though a six-decibel change doubles the amplitude. This is why working in decibels rather than percentages gives predictable results.
Volume Changer — frequently asked questions
How do I increase the volume of an audio file?
Load it into the volume changer and raise the gain in decibels, or normalise it so the loudest peak lands at a target level. Preview before exporting, because raising a quiet file also raises its noise floor.
What does normalising audio actually do?
It finds the loudest peak in the file and applies one uniform gain change so that peak hits your target. The internal balance is untouched — it is not compression, and it does not make quiet passages louder relative to loud ones.
Why does my audio sound distorted after turning it up?
You have pushed peaks past the maximum the format can represent, which clips them flat. Reduce the gain until the loudest peak sits just below the ceiling, or normalise instead of applying a fixed boost.
How many decibels is twice as loud?
Roughly ten decibels for perceived loudness, though a six-decibel change doubles the amplitude. This is why working in decibels rather than percentages gives predictable results.
Can I fix a recording that is much too quiet?
You can raise it, but the hiss and room tone rise with it. Volume adjustment moves everything equally — it cannot separate signal from noise, so a badly recorded take stays a badly recorded take.
Is the file uploaded to change its volume?
No. All processing happens in your browser using the Web Audio API.
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Volume Changer
Make audio louder or quieter — free, precise, in your browser.