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Make your audio louder — without the clipping

Crank a quiet voice memo by +9 dB or bring a whole batch of podcast cuts up to a comfortable level. A built-in limiter keeps the peaks from distorting, and you can hear the difference before you save anything.

Drag & drop files here

Or click to browse (max 20 files, up to 200 MB each)

File upload

Runs in your browser · A/B-compare before saving · Up to 20 files at once

Why use this volume booster?

Boost without distortion

A brick-wall limiter is on by default, so the output never crosses 0 dB no matter how hard you push. You get loudness without the crunch — the same trick mastering engineers use to keep peaks in line.

Hear it before you save

A real-time preview player applies the gain as you move the slider — no processing pass needed. Press and hold the Compare button to A/B between the original and the boosted version, and pick the right amount before committing.

Precise dB control

Drag the slider anywhere from −20 dB to +30 dB in 0.5 dB steps, or tap a preset (+3, +6, +9, +12, +18 dB) for the common cases. The slider snaps softly to 0 dB so 'no change' stays easy to land on.

Twenty files in one pass

Drop in a folder of voice memos, podcast clips or lecture recordings — up to twenty files at once — and they all get the same gain in a single pass. Every other tool we've seen makes you do this one file at a time.

Headroom you can see

Each file shows its peak level next to the filename ('peak −9.4 dB'), so you know exactly how much you can push before clipping. If you turn the limiter off, a warning fires the moment your settings would distort the output.

Nothing leaves your browser

Encoding runs locally with ffmpeg compiled to WebAssembly. Your audio isn't uploaded, copied to a server, or stored anywhere we can see — even sensitive recordings like interviews and voice memos stay on your device.

Why people boost the volume of their audio

A voice memo too quiet to hear in the car

You recorded a long voice memo on a walk — three minutes of an idea you didn't want to lose, captured before it slipped. Two hours later you queue it up in the car, and even with the stereo turned all the way up, your voice is barely above the engine. You spoke softer than you thought, the wind ate the rest, and there's no replay button on a thought that already happened.

You drop the M4A into the tool, set the gain to +12 dB, leave the limiter on, and the preview plays back at a level you can actually hear. The slight breath sounds are louder too, but nothing crackles — the limiter caught the loudest peaks. You hit Boost & download, save the new file over to your phone, and the next morning the memo plays at the same comfortable level as your music.

The idea, finally audible.

Twenty podcast cuts mastered for upload at once

You produce a weekly podcast and this week's episode is a long interview broken into twenty short clips for social media. Each one came out of your editor at a different level — your guest moved closer and further from the mic, and you didn't catch it during the session. They can't all go up like this.

You drop all twenty MP3s into the page. Each row shows its peak ('peak −14.8 dB', 'peak −7.2 dB', 'peak −11.0 dB'). You set the gain to +6 dB, keep the limiter on, and hit Boost & download. The progress bars run through one after another. Forty seconds later, every clip is sitting comfortably in the same loudness band, ready to upload as a ZIP.

You'd budgeted half an hour for this in your editing software. You spent two minutes.

Old family videos, finally watchable on a Sunday

You've been digitising old camcorder tapes from family holidays. The picture's fine, but the audio was recorded on a cheap onboard mic in 1998 and sits about ten dB below what your TV expects. Your mum keeps reaching for the remote.

You extract the audio, drop it into the booster, and try +9 dB. The preview crackles slightly on a moment of laughter — the limiter wasn't on. You flip the limiter on, replay, and the laughter stays loud and clean. You save the boosted track, mux it back to the video, and Sunday's screening goes from 'what did she say?' to 'I forgot we did that'.

1

Drop in your audio

Pick one or more audio files, or drag a folder onto the page. MP3, WAV, M4A, AAC, FLAC, OGG and OPUS are all welcome.

2

Pick a gain and listen

Use the slider or a preset button to dial in the dB you want. The preview player applies the change instantly, and the Compare button lets you A/B between the original and the boosted version.

3

Boost and download

Hit Boost & download. Files process one at a time. Save each one as it finishes, or grab the whole batch as a ZIP at the end.

  • Your audio never leaves your browser, so there's nothing on our side to delete.
  • All boosting runs locally on your device. We don't see, store, or transmit your audio.
  • No sign-up, no email, no limits. Drop in your audio and turn it up.