Turn YouTube playlists into something you can actually conquer.
Playlist Predator is a modern web app that takes chaotic YouTube playlists and turns them into a clean, trackable, no-BS study / watch system. It tells you how long the playlist really is, how long it’ll take at different speeds, and lets you track exactly what you’ve done, skipped, or need to rewatch.
It works perfectly without login using local storage — and gets supercharged when you sign in, syncing everything to the cloud.
Live on Vercel. Fast. Snappy. Opinionated.
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🎯 Playlist analysis Total duration, remaining time, and speed-based estimates (upto 4x).
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✅ Smart progress tracking Mark videos as Done, Skip, or reset them back to Study (rewatch).
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⚡ Instant UI (optimistic updates) Clicks feel immediate — no waiting on the network.
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👤 Optional authentication (Supabase)
- Guests → progress stored locally
- Logged-in users → progress stored in Postgres
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🧠 Unified progress model No fake states. No duplicated data. Clean semantics.
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📚 Playlist sidebar Logged-in users get a sidebar showing every playlist they’ve ever opened.
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🌙 Dark mode out of the box
- Next.js (App Router)
- TypeScript
- Tailwind CSS + shadcn/ui
- Supabase (Auth + Postgres)
- YouTube Data API
- Vercel (hosting)
Playlist Predator uses a deliberately simple model:
DONE→ video watchedSKIP→ video skipped- (no entry) → video still in study / rewatch mode
There is no stored “rewatch” state — rewatch is an action, not a state.
This keeps counts accurate, logic predictable, and data clean.
npm install
npm run devCreate a .env.local with:
YOUTUBE_API_KEY = ...
NEXTAUTH_SECRET= ...
VERCEL_URL= ...
NEXT_PUBLIC_SUPABASE_URL= ...
NEXT_PUBLIC_SUPABASE_PUBLISHABLE_DEFAULT_KEY= ...
NEXT_PUBLIC_SUPABASE_ANON_KEY= ...This project is actively developed and already production-ready. Expect polish, refinements, and more predator instincts.
Licensed under the MIT License. See LICENSE for details.
Because playlists shouldn’t hunt you.
You hunt them.
- Responsive mobile layout
- Add filtering and sorting to video list
- AI-powered playlist summarization
- Browser extension for quick playlist importing