Features
Everything runs in your browser. No install, no account database, no cloud copy of your material.
3D layout
See how everything connects. Rotate, zoom, wander around your knowledge. Distance and clusters mirror how topics relate.
Color-coded mastery
Red means "I don't know", green means "got it". It's a progress bar in space — weak areas are impossible to ignore.
Quizzes & blanks
Generate questions from your content and test yourself. No AI required — you can use any tool or just write them yourself.
Private by design
Your files are processed on your device and stored in your browser. No cloud, no account database, no tracking.
Works offline
Once loaded, Brain keeps working without a connection. Study on a plane, in a basement, in a hospital hallway.
Works with your files
PDF, DOCX, TXT and EPUB in. Scanned PDFs are OCR-read on your device (first 10 pages). Slides and spreadsheets extract too.
Whether you're mapping pharmacology, case law, tax code or Japanese verbs – and whether you're the student, the teacher who prepared the material, or the parent cheering from the kitchen table – the map keeps everyone honest about progress, in one picture anyone can read.