According to AlphaMoat, as of 2026-09, the Chrome extension CourseSpeed has 29 users (+123.1% MoM) — ranked #6,600 of 9,324 AI browser extensions, and #493 of 676 in Education & Research.
What is CourseSpeed
Course video speed control + AI notes. Udemy, Coursera, LinkedIn, Skillshare. First note free, then 5 free/mo. Video speed controller + AI course notes from subtitles, chapters & timestamps. Udemy, Coursera, LinkedIn, Skillshare. First note free, then 5 free/mo.
CourseSpeed is a video speed controller built for online course students on Udemy, Coursera, LinkedIn Learning, and Skillshare. Control playback speed from 0.25x to 4x, generate AI study notes from subtitles or lecture audio, track learning progress, and bookmark key moments — all in one free Chrome extension. No sign-up required.
🎮 Video Speed Controller (0.25x–4.0x) Unlike generic speed controllers that lose your settings on refresh, CourseSpeed remembers your preferred speed and restores it automatically — even when switching lectures within a course (SPA navigation). Full keyboard control:
- Shift+, / Shift+. — decrease / increase speed
- ← → — skip 5 seconds (customizable on Premium)
- Shift+H — toggle control bar visibility
- Shift+B — bookmark current moment
- Shift+/ — toggle between 1x and your last speed
All shortcuts work out of the box and persist across browser restarts.
⚡ AI Subtitle Summary (One-Click) The fastest way to turn any lecture into structured study notes. Click the 📝 button on the video control bar — CourseSpeed reads the full lecture subtitles, sends them to AI, and returns organized notes with chapter headings and timestamps. Click any timestamp to jump straight to that moment in the video.
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- Full transcript captured in seconds — no need to watch the whole lecture
- Chapters & timestamps generated automatically
- Works on Udemy, Coursera, LinkedIn Learning & Skillshare
- Subtitles are processed in memory only — never stored, never cached
🎙️ AI Study Notes (Audio Recording) For videos without subtitles, record the lecture audio in the side panel (up to 40 minutes). Audio is transcribed via speech-to-text, then processed into structured study notes with section headings. View all notes in a full-page reader. If an upload fails, your recording is kept — retry with one click.
📊 Learning Dashboard Your first AI note is free — it automatically starts a 7-day full-feature trial (unlimited AI notes + complete dashboard). After the trial you keep 5 free AI notes every month, and can upgrade anytime for unlimited notes, weekly watch time, learning streaks, total hours saved, weekly goal progress, and CSV export.
🔖 Bookmarks Save your spot with one click (Shift+B). View all bookmarks with timestamps. Jump back to any moment instantly. Free users: up to 3 bookmarks. Premium: unlimited.
📚 Supported Platforms Udemy | Coursera | LinkedIn Learning | Skillshare
💰 Free vs Premium
| Feature | Free | Premium | | --- | --- | | Speed Control (0.25x–4x) | ✅ Unlimited | ✅ Unlimited | | Speed Memory (persist across sessions) | ✅ | ✅ | | Keyboard Shortcuts | ✅ All | ✅ All | | AI Subtitle Summary | 1st note free + 5/month | Unlimited | | AI Study Notes (audio recording) | 1st note free + 5/month | Unlimited | | Timestamp Bookmarks | 3 total | Unlimited | | Learning Dashboard | 7-day trial (starts with your first note) | Lifetime access | | Custom Skip Durations | 5s only | Any value | | CSV Data Export | — | ✅ | | Weekly Learning Goals | — | ✅ |
Premium: $4.99/month or $39.99/year (save 33% — just $0.11/day)
🛡️ Privacy
- Bookmarks, notes, and learning stats are stored locally on your device
- No sign-up required for core features
- No analytics in the extension, no ads
- We generate a random anonymous install ID (no personal data) used only to count monthly free notes fairly — not linked to any account or identity
- AI Notes audio is sent to our server solely for transcription, immediately discarded after processing — no audio is stored
- Subtitle text is processed in memory only and released immediately after the summary is generated — never cached or saved
❓ FAQ Q: Is this different from YouTube summarizers? A: Yes. YouTube AI tools only work on YouTube. CourseSpeed works on course platforms — for subtitled lectures it reads subtitles directly, and for videos without subtitles it records the tab audio while you watch, then transcribes.
Q: Does this download or record courses? A: No. CourseSpeed controls video playback speed and captures audio for AI note generation only. It cannot and will not download, record, or redistribute course videos. Audio is discarded immediately after transcription.
Extension profile
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.