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How to make audio louder

A recording that's too quiet is one of the most common audio problems — and one of the easiest to fix. There are two tools for the job: normalize, which raises the level automatically to a sensible target, and a manual volume control for fine adjustments. Here's how to use both in your browser.

This uses the free AudioTrim editor, which processes everything on your device — your file is never uploaded.

Step by step

Open your file. Drag the audio onto audiotrim.app. A quiet recording shows up as a short, flat-looking waveform.
Click Normalize. This is the one-click fix: it finds the level of your audio and raises the whole thing to a consistent, audible target. For most quiet recordings, this alone solves the problem.
Fine-tune with Volume. If you want it a little louder or quieter still, nudge the Volume control up or down. Watch that the waveform doesn't hit the very top and bottom edges, which means it's clipping (distorting).
Listen back. Play it to check the level feels right and there's no distortion.
Download. Export as MP3 or WAV.

Normalize vs. Volume: Normalize raises audio to a defined target automatically — great for getting a consistent level and matching multiple clips. The Volume control is a manual boost or cut. Start with Normalize, then use Volume only if you want a further tweak. Learn more in what is audio normalization?

Why not just turn it up all the way?

Because audio has a hard ceiling. Push the level past that point and the loudest parts "clip" — they get chopped off and turn to harsh distortion that can't be undone. Normalize is smart about this: it raises the audio as loud as it can go without crossing that ceiling. Also worth knowing: making a recording louder also makes its background hiss louder, so a clean original always sounds better boosted than a noisy one.

Frequently asked questions

What's the fastest way to make audio louder?

Open the file and click Normalize. It's one click and handles most cases.

Why does my audio distort when I raise the volume?

You've pushed it past the maximum level and it's clipping. Lower the volume until the distortion goes away, or use Normalize, which avoids clipping automatically.

Can I make just one part louder?

Yes — select the section on the waveform first, then apply the volume change to that selection only.

Will making it louder add noise?

It raises whatever is already there, including background hiss. It won't add new noise, but it makes existing noise more audible.

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