How to Increase Audio Volume (Make It Louder, Free)
A recording that's too quiet to hear is frustrating, especially on phone speakers. The Volume Booster raises the volume of quiet audio up to 4x, lowers loud audio, or auto-normalizes it for a consistent level — all in your browser.
Boosting vs normalizing
Boosting multiplies the volume by a fixed amount, which is simple and great for uniformly quiet recordings. Normalizing analyzes the whole track and adjusts it to a consistent target loudness, which is better when the volume varies. Avoid pushing so loud that the audio distorts (clips).
How to make audio louder
- Open the Volume Booster and add your file. 2. Choose a gain (such as 2x), a reduction, or auto-normalize. 3. Process and download the MP3. The work happens locally, so your audio stays private.
Avoiding distortion
If a boosted file sounds harsh or crackly, you've pushed past the maximum and it's clipping — drop to a lower boost or use normalize instead. For very quiet speech, boosting plus a follow-up pass through the Audio Compressor can even out the result.
Frequently asked questions
How do I make a quiet audio file louder?
Open the Volume Booster, choose a boost like 2x, and download the louder MP3 — free, in your browser.
What's the difference between boost and normalize?
Boost multiplies volume by a set amount; normalize adjusts the whole track to a consistent loudness, which is better when levels vary.
Why does my boosted audio sound distorted?
The boost is too high and the audio is clipping. Use a lower boost or the normalize option.
Is my audio uploaded?
No. The adjustment happens in your browser, so the file never leaves your device.
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