Remove pauses from a lecture recording
Board-writing pauses, slide changes, thinking gaps — cut automatically so an hour of lecture takes far less to watch.
Free · No signup · Files never leave your device
Drag and drop an audio or video recording
or click to browse
Sensitivity
Strong cuts shorter pauses and quieter sounds
How it works
Drop your recording
It stays on your device — nothing is uploaded.
Silence detected & cut locally
Silent gaps are found and removed right in your browser via WebAssembly.
Download the result
See how much dead air was cut, then download for free — no watermark.
Study the content, skip the waiting
Recorded lectures are the least dense media students consume: the pause while the professor writes, the silence during slide transitions, the gap after "any questions?". None of it helps you learn, and all of it is detectable by loudness. The Strong preset removes those stretches automatically while a kept margin around every cut keeps sentences natural.
Combined with 2× playback — either your player's speed button or our speed changer for a permanent copy — a 90-minute lecture becomes a focused half-hour session. Everything runs locally, so recordings that aren't yours to share (most university content) never leave your machine.
Frequently asked questions
Lectures are one-directional — there is no conversational rhythm to preserve, so shorter pauses can go too. Strong cuts gaps down to about a third of a second, which routinely shaves 15–30% off a recorded class without touching a single word.
If the slides or board matter, keep video: the cuts stay frame-synced, though the re-encode takes a while for long recordings. If you only relisten, the audio-only export is much faster and the file is a fraction of the size.
Yes — remove the silence first, then run the result through our speed changer at 1.5× or 2×. The two compound: a tightened lecture at 2× typically plays in under 40% of the original time.
Yes. The silence remover is completely free, with no signup, watermarks, or limits. We make money from our video translation service, not from this tool.
No. The silence removal happens locally in your browser using WebAssembly. Your file never leaves your device — you can even disconnect from the internet once the page has loaded.
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Cut a clip out of any video — optionally clean up the audio and export as video or audio.
Fix quiet or uneven audio — normalize loudness to broadcast standards or boost by decibels.