Adjust Video Volume Online

Boost quiet dialogue or reduce clipping from hot microphones without opening a desktop NLE. Set a percentage gain, preview in the browser, and export a new MP4 with normalized loudness for podcasts, interviews, and screen recordings.

Because FFmpeg runs locally, sensitive voiceovers and unreleased ads never leave your computer — there is no cloud queue and no account required.

How to change video volume in the browser

1

Upload video

Add MP4, MOV, or WebM with the audio you want to adjust.

2

Set gain level

Choose a percentage — e.g. 50% quieter or 200% louder. Avoid extreme values that distort.

3

Process

FFmpeg rebuilds the audio stream and muxes it with video.

4

Preview result

Scrub playback; if distorted, re-export with a lower gain.

5

Download

Save the adjusted MP4 and archive your untouched original separately.

Common use cases

  • Interview cleanup

    Guests far from the mic become intelligible after a moderate boost.

  • Gameplay captures

    Balance game audio against commentary before uploading to YouTube.

  • Stock footage mix

    Lower overpowering music beds under new narration in marketing cuts.

  • Classroom recordings

    Students watching on laptops hear quiet lecturers more clearly.

Best practices

  • Increase volume in steps — +150% is often enough before distortion appears.
  • If audio clips harshly, reduce gain instead of pushing past 300%.
  • Mute and replace audio entirely when the track is unusable (background hum, wind).
  • Combine with compress for smaller files after level fixes.
  • Export WAV or MP3 separately via Video to MP3 if you only need audio.

Formats & compatibility

Outputs MP4 with re-encoded audio (AAC) and H.264 video. Extreme gain may introduce clipping if the source was already loud. Works best on desktop Chrome/Edge with sufficient RAM for your file size.

Related tools

Set your target volume above and download a balanced MP4 in minutes.

Frequently asked questions

Moderate boosts (up to ~200%) usually stay clean. Heavily compressed sources may distort — recover from the original if possible.
It applies a simple gain multiplier, not broadcast loudness normalization. For LUFS targets, use a DAW after exporting audio.
Video is re-encoded alongside audio; visual quality remains high at default settings.
Yes — choose values below 100% to attenuate loud clips.
No. Processing is 100% local in your browser.
MP4, MOV, WebM, and AVI inputs are typical; output is MP4.