Adjust Audio Volume in Your Videos Adjust the audio volume level in your video files.

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Video Volume Adjuster

Adjust the audio volume level in your video files.

Upload Video

Drag and drop your video file or click to browse.

Set Volume

Use the slider to increase or decrease volume (0-300%).

Apply & Download

Click Apply and download your volume-adjusted video.

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What Is Video Volume Adjuster?

The Video Volume Adjuster is a free browser-based tool that lets you increase or decrease the audio volume in video files. Boost quiet recordings up to 300% volume or reduce loud audio down to a whisper. The tool uses the Web Audio API's GainNode to adjust audio levels precisely while maintaining audio clarity. Preview the volume change in real-time before processing. It's perfect for fixing quiet recordings, reducing loud background noise, or normalizing audio levels. All processing happens locally in your browser — no files are uploaded.

Why Use Video Volume Adjuster?

Boost quiet audio up to 300% volume
Reduce loud audio with precise control
Real-time audio preview
No uploads — private client-side processing

Common Use Cases

Fix Quiet Recordings

Boost volume on recordings that were captured at too-low levels.

Reduce Loud Audio

Decrease volume on videos with excessively loud audio.

Normalize Levels

Adjust volume to consistent levels across multiple clips.

Background Music

Lower the audio volume of videos intended as background content.

Technical Guide

The Video Volume Adjuster uses the Web Audio API to modify audio gain. A GainNode is created with the specified volume multiplier (0.0 to 3.0). The video's audio is captured via createMediaElementSource(), routed through the GainNode, and sent to a MediaStreamDestination. The gain value is linear: 1.0 is original volume, 2.0 is double, 0.5 is half. For the recording, the gain-adjusted audio stream is combined with the canvas video stream and fed to MediaRecorder. Preview functionality routes the gain-adjusted audio to both the speakers (for monitoring) and the MediaStreamDestination. Clipping prevention is applied for high gain values to avoid audio distortion.

Tips & Best Practices

1
Boosting very quiet audio above 200% may introduce noise
2
Preview the volume change before processing to check for distortion
3
Values above 100% may cause audio clipping — listen carefully
4
For precise audio editing, consider using a dedicated audio editor

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Frequently Asked Questions

Q Can I make audio louder than the original?

Yes, you can boost volume up to 300%. However, high boost levels may introduce noise or distortion.

Q Does boosting video volume cause audio distortion?

Excessive volume increase can cause clipping/distortion. Preview the result and reduce the level if you hear distortion.

Q Are my videos uploaded to a server?

No. All processing happens in your browser — no files are uploaded to any server.

Q Can I adjust volume for just part of the video?

This tool adjusts volume uniformly. For section-specific changes, you'd need video editing software.

Q Does it work with videos without audio?

Videos without audio tracks won't have any sound to adjust — the tool will indicate if no audio is detected.

About This Tool

Video Volume Adjuster is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.