Your Sources. Your AI.
Give it your PDFs, YouTube videos, or audio files. Ask it anything. It only knows what you give it — and it cites every answer.
Free to start — 15 questions/day, no credit card required
Three Steps. That's It.
Upload Your Sources
PDFs, YouTube URLs, audio recordings, web pages — anything you want your AI to know.
Ask It Anything
Chat naturally. It reads your sources, finds the answer, and tells you exactly where it found it.
Get Cited Answers
Every response references specific pages, timestamps, or passages. Click a citation to see the source.
What Makes It Different
This isn't ChatGPT with a document attached. This is a fundamentally different kind of AI.
Source-Locked
It cannot access the internet. It cannot use general knowledge. If the answer isn't in your sources, it says so.
Citation-First
Every answer includes clickable citations. PDF page numbers. YouTube timestamps. You can verify everything.
Side-by-Side Viewer
Click a citation and the PDF jumps to that page — or the video seeks to that exact moment. Read the source yourself.
Share Privately
Create private knowledge bases and share them with specific people via link — perfect for teams, students, or clients.
Projects created
Documents imported
Questions answered with citations
“I imported 40 hours of podcasts and can now search every episode instantly. This replaced three different tools for me.”
Alex R.
Independent Researcher
“The fact that it refuses to answer if it's not in my sources is the killer feature. No more AI hallucinations in my workflow.”
Dr. Sarah K.
University Professor
“I built a Codex from my YouTube channel and my subscribers love it. It's like having a searchable version of everything I've ever said.”
Marcus T.
YouTube Creator
Built for People Who Care About Their Sources
Whether you learn from YouTube, teach at a university, or create content — myCodex keeps your AI honest.
YouTube Learners
Turn hour-long videos into 2-minute answers. Paste a URL and start asking questions.
Learn more →Researchers
Tired of AI pulling from everywhere? Lock it to only the sources you trust.
Learn more →Content Creators
Turn your books and courses into a subscription-based AI. Your content, your revenue.
Learn more →Schools & Colleges
Give every student an AI tutor locked to your curriculum. Starting at $300/class/semester.
View pricing →Bring Your Codex Anywhere
Browse YouTube, research documents, explore any website — with your AI knowledge base open right beside it. Import pages, search entire sites, and chat with your sources without leaving the tab.
Try It Free. No Credit Card.
Create your first project, upload a document or paste a YouTube URL, and start asking questions — on the house.