Increase Video Volume
Drop in a video, drag the sound up to five times louder, and hear it before you save it.
Press play and drag the slider — what you hear is what the file will sound like.
The level it was recorded at. Drag right to boost, left to quieten.
Measures how loud the clip actually is and sets the slider to match a normal listening level.
- Length
- 0:00.0
- Picture
- —
- Audio
- —
- Format
- MP4
Quick — only the sound is re-encoded, the picture is copied across untouched.
How it works
How to increase the volume of a video?
Open your video
Drag a file onto the box or pick one from your device. It is read straight off your disk, so there is no upload bar and no file-size ceiling.
Drag the volume up
Press play and move the slider from 0% to 500%. The preview changes as you drag, so you are listening to the finished file rather than guessing at a number.
Or let it normalise
One tap measures how loud the clip actually is and sets the slider to a normal listening level — the answer to "how much louder?" without doing the arithmetic.
Download the louder copy
The file saves as "yourvideo-volume.mp4" with the picture copied across untouched. Your original stays exactly as it was on disk.
Why it sounds better
Amplify video sound without wrecking it
A digital audio track has a hard ceiling, and multiplying a quiet recording by four sends everything above a quarter of that ceiling straight through it. The usual answer is to chop the tops off the waveform flat, which is exactly what you are hearing when a boosted clip crackles and tears on every loud syllable. It is not that the audio was bad — it is that the booster ran out of room and shrugged.
This one bends the peaks instead. Anything below about 60% of the ceiling passes through as a straight multiplication, untouched; above that the curve leans over smoothly and approaches the ceiling without ever reaching it. Quiet detail comes up by the full amount you asked for, loud moments round over rather than shear off, and the join between the two is smooth enough that you cannot hear where it starts — which is the whole trick behind a boost that still sounds like a recording.
The preview is not an approximation of that. The slider drives the same curve the exported file is written through, so pressing play tells you what the download will sound like — including the point at which the limiter starts doing the work.
Spec sheet
Features
Up to 5× louder
A quiet phone recording can go to 500% — that is +14 dB, enough to rescue a clip filmed from across a room.
Hear it before you save it
The preview runs through the same gain and limiting the export does, so the level you set is the level you get. No render-and-check loop.
No crunch at the top
Most boosters chop peaks flat and the sound tears. Here peaks are rounded off smoothly, so a big boost stays clean rather than distorting.
Normalise in one tap
Measures the clip’s real loudness — ignoring the silent gaps — and sets a level that matches everything else you watch.
Picture untouched
Only the audio is decoded and re-encoded. The video frames are copied across bit-for-bit, so nothing about the picture changes.
Nothing uploaded
The video is read and written on your own machine. No upload queue, no server copy, no watermark and no signup.
Questions