Audio Volume Changer
Raise or lower the volume by a set number of decibels, hear it first, then save it as MP3 or WAV. Your audio stays on your device.
Drop a audio file hereAdd a audio file from your device
How to change audio volume
Choose a file
Pick or drop one MP3, WAV, M4A, Ogg or FLAC file.
Set the gain
Move the slider or type decibels, from −24 dB (quieter) to +12 dB (louder). 0 dB leaves the volume unchanged. Play the preview.
Apply and download
Choose MP3 or WAV, press Apply volume, play the result and download it.
What to know
- Decibels and the multiplier. Gain is a fixed change in level applied to every sample. +6 dB is about twice the amplitude (×1.995), −6 dB about half (×0.501). The page shows the exact multiplier for the gain you set.
- Clipping warning. The tool measures the loudest sample in your file. If your gain would push it past full scale (0 dBFS), you get a warning before export, because samples beyond full scale are cut flat and sound distorted.
- Prevent clipping (on by default). When on, a boost is limited to the headroom under full scale at the loudest sample, and the page shows both the requested and the applied gain. It never turns a boost into a cut, never compresses and never treats quiet and loud parts differently. Turn it off to apply exactly what you asked, clipping included.
- What this is not. It is not loudness normalisation: it does not aim for a target loudness, and it makes no true-peak or streaming-platform guarantee. The check is on sample peaks of the decoded audio; encoding to MP3 can add small overshoots, so leave a little margin if it matters.
- Preview. The preview plays your original through a gain control in your browser, so it follows the slider while it plays. It shows the applied gain, after any clipping limit. Your device volume still matters.
- Re-encoding. The result is a newly encoded file. MP3 at 192 kbps is a good default; WAV keeps the changed audio exactly as 16-bit PCM and is much larger.
Limits
- 100 MB
- 20 minutes
- 320 MB
Audio is decoded to 32-bit floating point in memory while you work (about 21 MB per minute of 44.1 kHz stereo), so very long or high sample rate files can run out of memory on small devices. The finished file is also held in memory until you download it. Cancel stops the work at once and keeps nothing.
What happens to your files
Everything runs in your browser. Your audio, its file name and its tags are not uploaded and are not sent to any server. They are not saved in the browser and not put in the page address. Refreshing or closing the tab discards them, and playback and results use temporary addresses that exist only on your device. See Privacy.
Not included
- Several files at once, or joining files
- Video files, or choosing between several audio tracks
- Copy-protected (DRM) files
- More than two channels (surround)
- Keeping tags, cover art or chapters
- Loudness normalisation or true-peak limiting
- Noise reduction, equalisation or other effects
Frequently asked questions
How much louder is +3 dB?
About 1.41 times the amplitude. +6 dB is about twice, +10 dB about 3.2 times. How loud it sounds also depends on your ears and your speakers.
Why was my boost smaller than I asked for?
Prevent clipping held it to the headroom in your file. The result shows the requested and applied gain. Turn the option off to apply the full amount.
Can it make a quiet file as loud as another?
Not automatically. This tool applies the gain you choose; it does not measure or match loudness.
Is my file uploaded?
No. It is read and processed in your browser. The site only delivers the page and its code.
Do I need an account?
No. The tool is free and needs no sign-in.