Change Video Volume
Make a video louder or quieter without touching the picture.
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Questions about what this tool does, which option to pick, or what it can and cannot handle.
This is the one part of the site that uses a server. The question you type here is sent to an AI provider to be answered — your files and whatever you put in the tool above are not, and the assistant cannot see them. Answers are generated and can be wrong; the tool itself is not guessing.
About the Change Video Volume
Two different complaints hide behind "the sound on this video is wrong", and one volume control answers both, pushed in opposite directions.
The first is a recording made too far from whoever was speaking. A phone on a table at the far end of a room, a laptop microphone catching a person two metres away, a camera that prioritised the wind over the voice. The result plays at a level where the viewer has to turn everything else down to hear it, and every subsequent video they watch then deafens them.
The second is a clip that is far too loud, which happens most often with music laid under speech by an app that assumed you wanted a music video. It clips on cheap speakers and it startles people watching at night.
Volume here is set in decibels, which is not intuitive until you know two numbers: adding six roughly doubles the perceived loudness, and taking six away roughly halves it. Most quiet recordings want somewhere between six and twelve. Anything above fifteen is worth suspecting, because a recording that needs it is usually one where the voice was barely captured, and multiplying a whisper multiplies the room hiss with it.
There is a ceiling and it is absolute. Digital audio cannot represent a value beyond its maximum, and a sample pushed past it has to go somewhere. Written carelessly it wraps round into a large negative value, which turns a peak into a crack of distortion and hands back a supposedly improved file that is worse than the one you started with. Here the samples are held at the maximum instead, so an over-ambitious setting flattens the loudest moments rather than destroying them, and you are told underneath the result that it occurred, which is the point at which to reduce the setting rather than after somebody else has heard it.
The picture is untouched throughout. Only the sound track is rebuilt.
How to use it
- 1Add the video.
- 2Move the slider — positive to make it louder, negative to quieten it.
- 3Run it, then listen to the result before you rely on it.
- 4If the panel warns that peaks were flattened, come back a few decibels and run it again.
Questions
- How many decibels do I need?
- Start at six, which sounds like about double. Twelve is a strong lift for a genuinely distant recording. Past fifteen you are mostly amplifying the room.
- Why did adding more stop making it louder?
- The loudest peaks have reached the ceiling and are being held there. Everything below them still rises, but the difference narrows and the sound starts to feel harsh.
- Does this change the picture?
- No. Only the audio track is rebuilt; the video frames go across as they are.
- Can I make one section louder than another?
- Not in a single pass. Trim the section out, lift it on its own, and join the pieces back together.