Free Audio Volume Booster

A volume booster increases or decreases the loudness of an audio file without touching its speed, pitch, or format. It's the right fix when a recording came out too quiet, a podcast has uneven levels between takes, or a track needs a small loudness adjustment before sharing — a straightforward gain change, nothing more.

Recordings end up too quiet for all kinds of ordinary reasons: a voice memo captured at arm's length, a lecture or interview recorded on whatever device was on hand, a podcast segment that came in at a different level than the rest of the episode, or a music track exported at a conservative level to leave headroom. In every one of those cases the audio itself is fine — it just needs to be louder, which is exactly what a gain boost does without re-processing anything else about the file.

Reducing gain matters just as often as boosting it. A recording that's already clipping or distorted from being captured too hot can sometimes be brought back to a listenable level by pulling the gain down, though it won't undo distortion that already happened at the moment of recording. More commonly, reducing volume is about consistency — matching one clip's level to the rest of a project, or turning a track down before handing it off somewhere with its own loudness expectations, like a podcast platform or a shared mix.

1. Upload your AAC, AIFF, FLAC, M4A, MP3, OGG, or WAV file.
2. Move the gain slider to your target dB value, positive to boost or negative to reduce.
3. Click Adjust volume to process the file.
4. Download the result — same format as your upload, just at the new level.

+6dB to +10dBis a solid, clearly audible boost without heavy clipping risk on most recordings. Going much higher toward +30dB will often introduce distortion — that's the tradeoff of pushing gain that far, not a flaw in the tool.

On the reduction side, -6dB to -10dBis enough to noticeably quiet a recording that's too loud, while still keeping it clearly audible.

+3 dB

A subtle, barely-there increase

+6 dB

Clearly louder, low clipping risk on most material

+10 dB

Much louder; check for clipping on already-loud recordings

+20 dB

More likely to clip unless the source had a lot of headroom to begin with

+30 dB

Only for very quiet source material — high clipping risk otherwise

Where clipping actually sets in depends on how much headroom the original recording already had — a very quiet source can often take a bigger boost before clipping than a recording that was already close to its loudest point. The tool reads your file's loudest peak before you run it and shows what the boost would do to it, so you can see a clip coming rather than hearing it afterwards.

Clipping happens when a boosted signal tries to go louder than the format's maximum representable level, so instead of the waveform's peaks following their natural shape, they get cut off flat. That flattening is what produces the harsh, crackling distortion associated with an over-boosted recording. It's not something a volume tool can fix after the fact by adjusting gain back down — once a peak has been clipped, the detail that got cut off is gone, not just quieter. The only real prevention is boosting conservatively enough that peaks stay under the format's ceiling in the first place, which is exactly why the guidance above stays in a moderate range for most material.

The two terms get used interchangeably, but they describe different things. Gainis a change applied to the actual audio data itself — it's baked into the file you download, and it's what this tool adjusts. Volumeusually refers to playback loudness on whatever device or app is playing the file back — your phone's volume buttons, for instance, change nothing about the file itself. If a file sounds too quiet even at full playback volume, that's a sign the file needs a gain boost, not just a louder playback setting.

If background noise, not just loudness, is the issue, our Noise Remover is the better fit — a volume boost raises noise right along with everything else. If you want a target loudness rather than a fixed gain change, the Loudness Normalizer picks the amount for you. Need to cut a clip down before adjusting its level? Try Trim Audio first, or head to the Audio Converter if you need a different file format afterward.

Want the full explanation of why clipping happens and where gain adjustments fit in a mixing workflow? Read Gain Staging Explained for Home Studios.