Know if a video is worth it before you click.
Clarion gives every YouTube video an instant credibility verdict. Skip the junk, catch the hype, and remember the ones that matter.
- ✓Verdict on any video
- ✓Score + 3 takeaways on hover
- ✓AI Smart Notes
- ✓Spaced-rep quizzes
- ✓Knowledge Graph & recall
- ✓Finance & travel deep-dives
One click turns any video into a study guide — filed in your Vault automatically.
Judge first, then remember
It starts with the verdict. The rest keeps it forever.
Judge what to watch, capture what matters, organize what you save, recall what you learned, and extend it into wherever you already work.
🎯The front door · Judge
Vibe Check — an instant verdict on any video
Hover any thumbnail — any topic, any channel. In 3 seconds get a 0–100 credibility score, a ✅/👀/⏭ call, and the 3 key takeaways. Spot the hype, skip the filler, and find the videos actually worth your time.
- Works on any video — reviews, tutorials, news, and more
- Score + verdict + 3 takeaways, right on hover
- Extra risk flags on finance videos & aging info
23m- ›Traces the historical feud that birthed complex numbers
- ›Visualizes rotation in the complex plane intuitively
- ›Ends with Schrödinger's equation as the payoff
Hover a thumbnail to preview its verdict — live, like the extension.
📚Then · Capture
Smart Notes — AI study guides for any video
Click once. Get a polymodal guide with timestamped steps, KaTeX-rendered formulas, syntax-highlighted code, prerequisite glossaries, derivation chains, and pro-tip callouts.
- Timestamps that jump back into the video
- Formulas, code, and key insights side-by-side
- Output in 35+ languages with RTL support
🧠Then · Organize
Vault — Your YouTube knowledge, organized
Cloud-synced library with 15 smart folders, fuzzy full-text search, and bulk tag management. Plus a force-directed Knowledge Graph that shows how every note connects.
- Smart folders auto-tag every note
- Knowledge Graph with zoom / pan / focus mode
- Full-text search across thousands of notes
🔁And · Remember
Active Recall — Quiz, repeat, remember 4× longer
AI-generated quizzes (MCQ + fill-in-blank with explanations) from any note or folder. Spaced repetition surfaces the right card on the right day. Ask Vault chats with your library and cites its sources.
- Quiz Me on any note or folder
- Spaced repetition + daily reminder
- Ask Vault chat with inline citations
🌍And more · Extend
Travel Pro · Finance Audit · Export anywhere
Travel videos auto-extract visa info (localized to your country), expense breakdowns (auto-converted to your currency via live forex), and itineraries with Google Maps + Booking deep-links. Export anything to Anki, Obsidian, or Notion.
- Travel Pro: visa + itinerary + budget, localized
- Finance Audit: risk flags on investment videos
- Sync to Anki, Obsidian, Notion (Premium)
How it works
From passive viewer to active learner — in four steps.
- 01Hover
A 3-second verdict, score, and 3 takeaways appear before you click. Skip the duds.
- 02Save
One click turns any video into a structured AI study guide in your Vault.
- 03Quiz
Spaced-rep flashcards surface the right note on the right day — automatically.
- 04Remember
Streaks, knowledge graphs, and chat-with-your-vault lock it in for the long term.
See it in action
The Credibility Leaderboard
73 popular videos, run through the same Vibe Check the extension uses — ranked 0–100 on what each one actually says, not on views or clickbait.
Polyglot
Smart Notes in 35+ languages
Pick your language once. Every verdict, summary, formula caption, and flashcard renders in your tongue — with proper right-to-left layout for Arabic, Hebrew, Persian, and Urdu.
- EnglishWelcome
- EspañolBienvenido
- FrançaisBienvenue
- DeutschWillkommen
- PortuguêsBem-vindo
- हिन्दीस्वागत है
- العربيةأهلاً
- עבריתברוך הבא
- 中文欢迎
- 日本語ようこそ
- 한국어환영합니다
- فارسیخوش آمدید
Pricing
Pick a plan. Cancel anytime.
Free is genuinely free. Pro pays for itself in saved hours.
Try every layer of Clarion. No card required.
- ✓20 vibe checks / month
- ✓Smart Notes on 2h of video / mo
- ✓5 Ask Vault messages / mo
- ✓3 quiz previews / mo
For learners who watch — and remember — every day.
- ✓150 vibe checks
- ✓200 hours of Smart Notes
- ✓Unlimited vault + Quiz Me
- ✓50 Ask Vault messages
- ✓Daily review reminders
Power users who export to Anki, Obsidian, and Notion.
- ✓500 vibe checks
- ✓600 hours of Smart Notes
- ✓Everything in Pro
- ✓500 Ask Vault messages
- ✓Sync to Anki / Obsidian / Notion
Stop watching the wrong videos. Start remembering the right ones.
Free forever. Works on any YouTube page. Sign in only when you're ready to save.