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Jump Cutter
A browser extension that fast-forwards long pauses between sentences, including while watching lectures.
About Jump Cutter
Jump Cutter is an open-source browser extension that automatically fast-forwards long silent pauses in online video content, including lectures, stream recordings, webinars, and podcasts. It operates in real time using two separate algorithms that detect audio loudness to adjust playback speed or skip silent sections, with a buffering mechanism to avoid cutting off the start of spoken words. The extension is available for Chromium and Firefox browsers.
Key features
- Fast-forwards long silent pauses in online videos in real time
- Optimizes playback for lectures, VODs, webinars, podcasts and unedited videos
- Uses a stretching algorithm to buffer audio and preserve word start sounds
- Includes an experimental cloning algorithm for silent segment detection
- Automatically detects video elements on loaded and dynamically added pages
- Available for Chromium and Firefox browsers
Best for: Users who regularly watch long unedited video content such as lectures, stream recordings, webinars, or podcasts and want to reduce total watch time by skipping silent pauses.
Good for
- Open source, with publicly available source code for review and modification
- Operates in real time with no need to pre-edit or process videos beforehand
- Includes a buffering mechanism to avoid cutting off the start of spoken words
Watch out for
- The cloning algorithm is marked as experimental and not fully stable
- The stretching algorithm has a limited 200ms look-ahead buffer for audio
- Only works on web pages with embedded HTML5 video elements, not standalone video files
Jump Cutter at a glance
- Website
- github.com/WofWca/jumpcutter
- Category
- Social & Communities › YouTube Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Jump Cutter FAQ
What types of video content is Jump Cutter designed for?
It is intended for lectures, stream recordings (VODs), webinars, podcasts, and other unedited videos.
How does the extension avoid cutting off the start of spoken words?
It uses a stretching algorithm that buffers audio for ~200ms before output, then slows the buffered audio to play word start sounds at normal speed.
Is the cloning algorithm stable for regular use?
No, it is marked as experimental and must be manually enabled via a checkbox in the extension settings.
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