Turn YouTube playlists into courses you finish
LessonCrumb tracks which videos you've watched, how far you've come, and where to pick up — both on the web and right inside YouTube.
How it works
Find a playlist
Open any YouTube playlist — a coding course, language lesson, or fitness series. Paste the URL into LessonCrumb or use the browser extension right on the page.
Add it as a course
LessonCrumb saves the playlist to your dashboard and starts tracking your progress automatically as you watch.
Pick up where you left off
Every time you return, LessonCrumb shows your progress and jumps straight to the next unwatched video — no more scrolling to find your place.
Everything you need to stay on track
Visual progress tracking
See exactly how far through each course you are with a live progress bar and percentage. Completed courses move to their own section automatically.
Resume in one click
Open Classroom jumps you straight to the next unwatched video. Your place is saved whenever you finish a video — even if you close the tab.
Sync across devices
Sign in with Google to sync your watch history to the cloud. Start on your laptop, continue on your phone — your progress follows you.
Focus mode
Hide courses you aren't actively working on to keep your dashboard clean and your attention on what matters right now.
Invested time
LessonCrumb logs the real time you spend watching. See how many hours you've put into each course — motivation to keep going.
Import & export
Already tracking courses elsewhere? Import your history as JSON and export a backup at any time.
Track progress right inside YouTube
The LessonCrumb extension adds progress tracking directly onto YouTube pages — no tab-switching, no copy-pasting URLs.
Extension on YouTube playlist page
- Checkbox next to every video — tick it done without leaving YouTube
- Progress bar at the top of every playlist page
- Overlay on your YouTube homepage showing course progress
- Syncs with the web dashboard when you sign in
- Works offline — data lives in your browser, not a server
- Supports Chrome and Firefox (Manifest V3)
Stop rewatching videos you've already seen.
LessonCrumb remembers your place so you can stay focused on learning.