Raise or lower a video volume by percentage or decibels, or normalise it, and see the loudness measured before and after. The picture is never re-encoded.
Your files are processed in your browser, on your own device. Nothing is uploaded to a server.
A video nobody can hear is a video nobody watches. If your clip is too quiet, recorded across a room or on a shy microphone, this tool makes it louder: raise the volume by a percentage, up to four times, or type an exact decibel change. If a clip is painfully loud, bring it down, to as low as a tenth of its level. There is also a normalisation preset that evens a recording out toward the loudness level streaming platforms aim at.
The detail this page is proudest of sits in the result: before and after loudness measurements, read from the actual audio. Most volume tools tell you they applied your setting and show nothing. Here the result reports the mean and peak levels of your source and of the finished file, so the change is a measurement, not a promise.
1. Drop the video into the box, or click to choose it.
2. Drag the slider or type a percentage: 200 doubles the volume, 50 halves it. Or type a decibel change if you work in dB.
3. Or press the Normalise preset to even the level out toward about minus 16 LUFS, the zone streaming platforms target.
4. Press Change the Volume. The picture is copied untouched. Only the sound is written. Check the before and after numbers in the result.
The percentage multiplies the strength of the audio signal. Every doubling adds about 6 decibels. Decibels are the audio world’s ruler, and the field accepts them directly when a guide or an editor gave you a figure. Normalising is different: it measures the overall loudness of the whole clip and adjusts so quiet and loud recordings land at a similar level, which is why it suits a batch of clips recorded in different rooms.
The engine note: this runs a real encoder inside your browser. The first job downloads about 31 MB of engine files once, your browser caches them, and your video itself never leaves the device.
Making a quiet track louder also makes its background noise louder: hiss, hum and room echo gain exactly as much as the voice. The tool warns when a big boost will push peaks into clipping, the harsh distortion that cannot be undone, but it cannot clean a recording, only raise it. The slider stops at 10 percent at the bottom on purpose: a sound kept but nearly silent is this tool’s job, while removing sound entirely is the mute video tool, and the two are cross-linked because they are confused constantly. Everything else is in the video tools collection.
Up to 400 percent, four times the signal, about plus 12 decibels. Beyond that, most real recordings clip and distort, so the range stops where it stays useful. The tool warns when your chosen level will clip the peaks it measured.
They set the same thing two ways. The slider is a percentage of the current strength. The dB field is the audio industry’s unit. 200 percent and plus 6 dB are the same change.
It measures the whole clip’s loudness and adjusts it toward about minus 16 LUFS in one pass, the level zone streaming platforms normalise to, so a quiet recording ends up at a standard, comfortable loudness.
No. It raises everything equally, noise included, and it cannot add clarity that was not recorded. It fixes level, not quality.
No. The picture is copied exactly. Only the audio is re-written at the new level, which keeps the job fast.
Mute deletes the sound track from the file. This tool keeps the track and changes its level. Its quietest setting is still a real, turn-up-able sound. They are linked from each other’s pages because the mix-up is common.
Same rules as this one: free, in your browser, with nothing uploaded.
Take the sound out of any video as an audio file.
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