Video Volume Booster
Make a quiet video louder. Raise the gain up to 3x, listen to the preview, then download the louder video — everything happens in your browser.
MP4, WebM or any browser-supported video.
1x = normal, 2x = double, 3x = maximum. Sound can crackle at high gain — listen to the preview first.
How it works: The video plays in your browser, digital gain makes the audio louder, and the screen plus sound is recorded into a new video (WebM). For a long video, reaching the download takes about as long as the video length. Privacy: nothing is uploaded.
How to use
- Select your video file.
- Set the volume boost slider (from 1x to 3x).
- Press Preview with Boost to check that the sound is right.
- Press Boost & Download Video — when the recording finishes, the louder video will download.
Tips
- Raise the gain gradually and stop at the first level that sounds clear — too far adds distortion.
- Always listen to the preview before downloading the louder file.
- On very quiet originals, background hiss may rise along with the voices.
Frequently Asked Questions (FAQ)
How much can I boost the volume?
The volume boost slider goes from 1x up to 3x.
How do I check the result before downloading?
Press Preview with Boost to listen to the louder audio, then use Boost and Download Video to save the new file.
Why does the boosted audio sound distorted?
Very high gain causes crackling. Raise the gain gradually and stop at the first level that sounds clear, and always listen to the preview before downloading.
What format does the louder video download as?
The boosted video is recorded into a new WebM video file.
Is my video uploaded to a server?
No. Everything happens in your browser, free with no signup.