Simple volume slider
Set volume from 0% (mute) to 300% boost—one control for every clip in the batch.
Free Online Video Volume
Boost or lower audio in MP4, MOV, MKV, and WebM videos online—free, fast, and easy to use. Drag and drop clips, set volume level, and download. Processing stays on your device to protect your privacy.
Drag & drop videos here,
or click anywhere in this area to choose files
MP4, MOV, MKV, WebM, AVI, and more · Max 300 MB per file
100%
Need large files, batch processing, or GPU acceleration? Download Videoradius Desktop for up to 10x faster exports.
Why Use This Free Online Video Volume?
Make quiet clips louder or tame loud audio—unlike other online tools, your files never leave your device.
Keep video quality
When possible we copy the video stream and only re-encode audio for faster processing.
Privacy-first
Everything runs in your browser on your device, so your original files stay private.
Supported Input Formats
Works with popular video formats for tutorials, highlights, social clips, and more.
Video inputs
MP4, MOV, MKV, WebM, AVI, MPEG, and other common video files up to 300 MB each.
Shorter clips process faster in the browser.
Video output
Export as MP4 (H.264) or WebM—with adjusted audio when a track is present.
Output filename includes the volume level (e.g. clip_150pct.mp4).
How to Adjust Video Volume Online in 3 Steps
From original footage to louder or quieter audio—in minutes.
1
Add videos
Drag and drop videos or click "Choose Files". You can queue multiple files at once.
2
Set volume
Move the volume slider and choose output format, then click Adjust Volume.
3
Download
Save your volume-adjusted videos directly to your device when processing completes.
More Free Video & Audio Tools
Process files in your browser — free, fast, and private.
Video Volume FAQ
Answers to common questions about adjusting video volume in your browser.
Is this online video volume tool free?
Yes. You can adjust video volume at no cost and without creating an account. Open the page, add your files, and click Adjust Volume.
Are my files uploaded to your servers?
No. Processing runs locally in your browser. Your files are processed on your device and are not sent to Videoradius servers.
Can I boost or lower MP4 volume online?
Yes. Add an MP4 or other supported video, move the volume slider from 0% (mute) to 300% (boost), and click Adjust Volume.
Will adjusting volume reduce video quality?
When possible we copy the video stream and only re-encode audio, so picture quality stays the same. Clips without audio export with video only.
What is the maximum file size?
Each video can be up to 300 MB. Larger or longer files may take longer depending on your device, browser, and chosen volume level.
Need trim, crop, or faster batch processing?
For advanced editing, GPU acceleration, and fully offline processing, try the Videoradius Video Converter desktop app for Windows. You can also use our free Online Video Cutter or Online Video Crop tools.
Need Pro Video Tools on Windows?
Videoradius Video Converter supports 300+ formats, GPU acceleration, batch processing, and 100% offline processing.