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Change Video Volume

Boost or lower the soundtrack by up to 30 dB. The picture is copied exactly as it is.

Browser-first · upload only when a format needs it

Boost or lower the soundtrack by up to 30 dB. The picture is copied exactly as it is.

Opens MP3 · MP4 · WEBM · MOV · MKV · 3G2 · 3GP · AMV · ASF · AVI

or drop files and folders hereUp to 500 MB per file on the free plan · older formats use the server encoderFolders are welcome

How it works

  1. 01

    Choose a file for Change Video Volume. It accepts MP4, MOV, WEBM, MKV, M4V, AVI, WMV, FLV, MPEG, MPG, MPE, 3GP, 3G2, TS. Most files stay in this tab.

  2. 02

    Set the options on the workbench — preview, crop or timeline when this tool has one — then press Run.

  3. 03

    Download the result. It is also saved in your tray so the next tool can pick it up without another upload.

About this tool

Move the slider: +6 dB roughly doubles perceived loudness, -6 dB halves it. Only the audio track is decoded, scaled and re-encoded; the video stream is copied byte for byte, so the export is fast and the picture identical. Loud sources pushed too far are clipped at full scale — if the result sounds harsh, try a smaller gain.

Questions

What can I open in Change Video Volume?
Change Video Volume accepts MP4, MOV, WEBM, MKV, M4V, AVI, WMV, FLV, MPEG, MPG, MPE, 3GP, 3G2, TS. Older video containers such as AVI, WMV, FLV, MPEG and 3GP are decoded by the server encoder.
Does Change Video Volume upload my file?
Most MP4, WebM, images and PDF stay in this tab. Instagram/TikTok crops, DVD, GIF, iPhone presets, stabilize, hard containers (AVI, WMV, HEVC) and a failed local encode go to the server encoder. The file is processed and discarded — we do not keep a copy.
How large can the file be?
Free: 500 MB and 8 exports a day. Plus (waitlist) raises the daily cap. A pasted public file URL is also accepted.

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