Volume booster

How it works

1. 1

   Add your file

   Drop a video or audio file. It stays on your device.

2. 2

   Set the volume

   Slide from 10% to 400%. Press play, the preview is exactly as loud as the file you'll download.

3. 3

   Download

   Save the boosted file. The picture is copied untouched, so it's fast.

Why a recording is quiet, and what boosting can honestly fix

Digital audio has a hard ceiling. Zero dBFS is the loudest value a sample can hold, and there is nothing above it, so raising the gain on a track that already peaks near the top does not make it louder, it makes it clip: the peaks flatten off and turn into distortion. Boosting is only ever spending headroom that the recording left unused.

Normalizing is the honest version of the operation. It finds the loudest peak in the file, works out how much room is left below the ceiling, and lifts everything by exactly that much. The result is as loud as the recording can possibly be without distorting, and the relationship between the quiet parts and the loud parts is preserved untouched.

What no amount of gain can fix is the noise floor. A recording made too far from the microphone captures hiss, air conditioning, and room rumble alongside the voice, and boosting raises all of it in perfect proportion. If a recording is quiet because the gain was set too low, boosting genuinely rescues it. If it is quiet because the microphone was across the room, boosting gives you a louder version of the same problem.

Increase video and audio volume with no upload

The gain is applied on your own device, to a file that never leaves it, and the result downloads without a watermark or a size limit. Both video and audio files are accepted, so a quiet clip can be fixed without extracting the soundtrack and putting it back.

Because there is no upload, it costs nothing to try a setting, listen, and try another. That is the right way to do this: the correct amount of gain is the amount that sounds right, not a number chosen in advance.

If the audio is going to be reused on its own, the audio extractor will pull it out first. If a track is simply unwanted rather than too quiet, the muter removes it entirely.

Why nothing uploads

Other tools send your video to their servers, which costs them money per file, so they add watermarks, cap file sizes, and make you sign up. This tool does the work right here in your browser using your own device. Your file is never uploaded, so there is no wait, no watermark, no size limit, and no account.

Questions

How much louder can it go?

Up to 400% (about +12 dB). You can also turn a too-loud clip down, all the way to 10%.

Will boosting distort the sound?

Very loud passages can clip when pushed hard. Use the live preview, it plays at the exact gain you've set, so what you hear is what you get.

Does boosting re-encode the whole video?

No. Only the audio track is processed; the video stream is copied bit-for-bit, which keeps quality perfect and makes it quick.

Can I boost an MP3 or other audio file?

Yes. Drop an audio file and you'll get a boosted M4A back.

Does my file get uploaded?

No. The boost happens in your browser; your file never leaves your device.

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