Free Online Volume Changer

Make a track louder or quieter, in dB.

Free to use on Mac, Windows, and mobileNo installation requiredTLS encryption keeps your files safe

What is this tool

AudioToolKit changes the volume of any audio file online for free, in your browser. Apply exact gain between -24 and +24 dB to make a quiet voice note louder or tame a hot mix, with clamping so the file does not clip. The processed track downloads as MP3 or WAV, and the file never leaves your device — no install, no account, no upload.

Drag and drop your files here

MP3, WAV, M4A, AAC, OGG, FLAC, AIFF, AIF, OPUS, WMA, AMR — up to 25 MB per file

Gain (dB)

Output format

Output

Level-adjusted MP3 or WAV

Accepted formats

.mp3, .wav, .m4a, .aac, .ogg, .flac, .aiff, .aif, .opus, .wma, .amr

Why use this free tool

A voice note that is too quiet, a track that sits too low in a mix — exact gain in dB fixes both. The volume changer scales the whole file, clamped so it does not clip.

How does the free volume changer work?

1
Upload the file.
2
Set the gain: +6 dB makes it noticeably louder.
3
Press Process and download.

Frequently asked questions

What is a good boost?

+6 dB is a clear lift; +12 dB is large. If the source is already hot, boost less to avoid clipping.

Difference from Normalize?

Volume applies a fixed gain. Normalize measures the file and scales it to a target loudness automatically.

Local processing?

Yes, in your browser.