Volume Changer
Raise or lower the level of any audio file by an exact multiplier, with clipping protection and optional fades.
Convert with this tool
or choose a file from your device — it is processed in this tab and never uploaded
Accepted: WAV, MP3, FLAC, M4A/AAC, OGG, Opus
Files stay on your device. There is no upload, no queue and no watermark, so a conversion works even with the network switched off after the page has loaded.
Supported formats & processing
| Accepted input | WAV, MP3, FLAC, M4A/AAC, OGG, Opus |
|---|---|
| Produced output | MP3, WAV, FLAC or M4A at the new level |
| Processing | Web Audio API + canvas + native JavaScript encoders |
| Upload required | No — the file is read locally and never transmitted |
How to use this tool
- Add the fileThe decoded peak level is measured as part of the result report.
- Set the gain multiplier1.5× is a subtle lift, 2× is +6 dB, 4× is +12 dB. Anything beyond that usually needs normalisation instead.
- Keep clipping protection onThis peak-normalises the boosted signal to just below full scale.
- Add fades if you need themUseful when the louder file will be used in a video edit.
- Convert and check the peakIf the reported peak is at 0 dBFS, the source was already close to clipping.
About this tool
A quiet recording is a common problem: a phone interview, a lecture captured from the back of a room, or a download that was mastered conservatively. Turning the volume up in a player works until you send the file to someone else and they have to do the same thing.
This tool applies a precise gain multiplier — 2× is +6 dB, 4× is +12 dB — during an offline render, and then optionally peak-normalises to −0.5 dBFS so the boosted result cannot clip. The result card shows the peak before and after, which is the number that tells you whether you had headroom to spare.
Features
- Precise gain in linear multipliers with the dB equivalent shown
- Peak levels measured before and after the change
- Clipping protection via peak normalisation to −0.5 dBFS
- Optional fade in and fade out in seconds
- Reducing the level works just as well as raising it
- Output in MP3, WAV, FLAC or M4A
Frequently asked questions
How much can I raise the volume before it distorts?
As far as the source's headroom allows. If the loudest peak in the original is −12 dBFS, you can add 12 dB — a 4× multiplier — before clipping. Enable clipping protection and the tool will handle the arithmetic for you.
What is the difference between this and normalisation?
This applies the gain you ask for. Normalisation measures the loudest peak and applies whatever gain is needed to reach a target. Clipping protection here is a form of normalisation applied after your gain.
Why is my file quieter after I raised the volume?
If you raised the gain but the result is quieter, the source must have had very high peaks — the normaliser pulled the whole signal down to fit them under full scale. Try a smaller multiplier and check the peak figures.
Will boosting the volume add noise?
It amplifies everything including the noise floor. If hiss becomes audible, the recording needs noise reduction before the level is raised.