Turn Lectures Into Learning Shorts
Auto-chapter the recording, clip the key explanations, subtitle in any language — local Whisper does the heavy lifting for free.
ViralMint is a free, open-source desktop app that repurposes educational video: a lecture or course recording gets transcribed locally by Whisper (free, unlimited, on your machine — recordings never upload), auto-chaptered into a navigable syllabus, and clipped into short standalone explanations that work as course marketing or study reels. Subtitles burn in for accessibility in 100+ languages, and the translate-and-dub pipeline produces full localized versions of a lesson — translated voice plus translated captions — for international students. For net-new content, kinetic-typography motion graphics turn definitions and key stats into animated explainers without slideware. The local-first design matters for education specifically: student-facing recordings and unpublished course material stay on your machine.
The workflow
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Transcribe and chapter
Drop in the recording; Whisper transcribes locally (any length, free) and Auto Chapters splits it into a timestamped syllabus for YouTube or your LMS. Auto Chapters →
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Clip the teachable moments
The AI clip picker finds self-contained explanations — the 45-second version of a concept — ranked by hook strength for course-marketing shorts. Clip extractor →
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Subtitle for accessibility
Burn subtitles in the original language for accessibility compliance, or export .srt files for your LMS player. Add subtitles →
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Localize whole lessons
Translate-and-dub produces a localized lesson — translated AI voice, translated captions — opening a course to markets you don't speak the language of. Translate video →
Frequently asked questions
Do student recordings get uploaded anywhere?
Transcription, chaptering, captioning and rendering all run locally — recordings never leave your machine. Only optional AI steps (clip scoring, translation, premium voices) send text (not video) through the cloud.
Is there a length limit on lectures?
No — local Whisper has no per-minute pricing or cap, so 3-hour recordings process fine (time scales with your CPU). That's the structural difference from per-minute cloud transcription tools.
Can it make content from my course notes directly?
Yes — the Motion Graphics mode composes animated explainers (kinetic typography, stat cards) from a topic brief, and the AI Video tools illustrate concepts with generated b-roll. Definitions-into-animation is a strong format for course marketing.
Free app. Prepaid credits. No seats.
ViralMint is open-source and free to install everywhere your team works — you pay cents per AI action, with pricing published per tool.