Mute Video Online Free Online UniConverter allows you to compress video, reduce video file size online for free without losing quality. The compressed files can be saved to Dropbox or downloaded directly. How to mute video online free? Step 1. Click the Mute Video extension icon on the top right corner of your Chrome browser. It will open the online free video mute page. Step 2. Drag and drop or click the Choose Files button to import video files you want to compress. Step 3. The mute video process will start automatically; just wait for a while. Step 4. Download the produced video to your local computer or save it to Dropbox.