Auto silence detection + removal (silencedetect → aselect/select) locally.

Tightening a 22-minute lecture by cutting dead air

The Silence Remover automatically detects and cuts silent stretches from an audio or video file in your browser, then hands you a log of every edit it made. Last week I ran a 22-minute lecture recording through it: threshold at -30 dB, minimum silent gap at 2 seconds. The log listed 41 separate cuts adding up to 6 minutes 40 seconds of dead air, so the export came out at 15 minutes 20 seconds. Same content, much tighter listen. I never opened an editor, and nothing was uploaded anywhere.

The minimum-gap setting matters more than people expect. At 2 seconds the tool leaves natural pauses alone and only eats proper dead stretches — right for lectures. Drop it to 1 second for a chatty podcast and it starts swallowing hesitation gaps too, which makes conversation feel rushed and clipped. My routine: run the defaults first, read the cut log, and only retune if a pause I wanted got eaten. The log shows every removed span with its timing, so nothing disappears blindly. Video files get the same treatment with frames cut in sync, so a rambling screen capture tightens up just as well as a voice memo does.