Uwarp

First run downloads FFmpeg (~25 MB) once in this browser. Processing stays on your device — no server upload.

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Boost volume online free

Boost volume online free. Increase audio or video volume in your browser with an adjustable volume booster — no server upload required.

What is an audio volume booster?

An audio volume booster (volume increaser) raises the loudness of an audio track or the soundtrack inside a video. Use it to boost video volume, increase audio volume, or make quiet clips louder — processed locally in your browser with FFmpeg WebAssembly.

Boost volume features

Increase volume for video and audio files online.

  • Audio volume booster

    Increase loudness on MP3, M4A, or WAV files with a gain slider.

  • Video volume booster

    Boost video volume while keeping the picture via stream copy when possible.

  • Adjustable gain

    Set volume from 50% to 500% (100% = original loudness).

  • No server upload

    Volume boosting runs locally with FFmpeg WebAssembly for privacy.

  • Simple download

    Download the louder file as soon as processing finishes.

How to increase volume for video or audio

Boost volume online in three steps.

  1. Upload media

    Drop an MP4, MOV, WebM, MP3, M4A, or WAV file (up to 200 MB).

  2. Set volume gain

    Choose a gain percent — try 150–250% for quiet recordings.

  3. Boost and download

    Click Boost volume, then download the result.

Great for

Common volume booster and volume increaser scenarios.

  • Quiet phone videos

    Increase volume of video clips recorded too softly.

  • Podcast and voice notes

    Make audio louder before sharing or publishing.

  • Presentation clips

    Boost soundtrack so embedded videos are easier to hear.

  • Quick loudness fixes

    Raise volume without opening a full desktop editor.

Frequently Asked Questions

Quick answers about this tool—open a question to read more.