Documents and ideas you only skimmed,
turned into structure you actually understand
AI structures long documents, and you map out new ideas yourself —
shaping both into a structure you can take in at a glance.
Sound familiar?
No time, and a mountain of material to sort
Reports, papers, handouts… just reading them is a lot, and you still have to pull out the key points.
You read it, but can’t tell what actually matters
The words went in, but nothing stuck — and you couldn’t explain it to anyone else.
You tried AI summaries, but ended up rereading anyway
The summary was too short or lost the context, so you opened the original again.
It’s not summarizing. It’s structuring.
BrainTooler goes beyond simple summaries: it follows the document’s logical flow
and builds a hierarchy that keeps only what matters.
This paper analyzes A and examines the relationship between B and C. In conclusion, it suggests that D is important...
Done in 4 steps
Start with AI or on a blank outline — either way, it flows the same.
Choose how to start
Upload a document for AI structuring, or start from a blank outline or mind map.
Build the structure
AI pulls out the key points, or you add topics yourself to build a hierarchy.
Edit the outline & mind map
Both views share the same structure. Change one and the other updates too.
Study & share
Lock it in with quizzes and flashcards, and share it with a single link.
Who uses BrainTooler
Students
Structure textbooks and papers, fill the gaps with your own mind maps, and speed up exam prep
Professionals
Organize reports and meeting notes and turn them into a first draft of a plan, fast
Researchers
Quickly compare and analyze the core structure of multiple papers
Educators
Rebuild class materials as a hierarchy to help students understand
Planners
Turn market research into a logical framework in no time
Founders
Refine the core logic of your business plan into a mind map you can take in at a glance
Before and after BrainTooler
Why BrainTooler?
The Saenggak Coding structuring method, combined with AI
BrainTooler brings the thinking process refined by Saenggak Coding (the method) to life with AI.
Structuring, not summarizing
We applied a cognitive-science-based way of thinking (chunking → categorizing → structuring → building a hierarchy) to AI. Instead of just shortening, it builds a logical skeleton.
Built-in outliner + mind map editor
Edit structured results right away, or build a mind map from a blank document. 30+ keyboard shortcuts, drag and drop, zoom and undo included.
Optimized for 6 document types
Textbooks, nonfiction, books, papers, reports and business plans — each gets its own dedicated structuring algorithm.
Plenty of output formats
See it instantly as an outline and mind map, then document it in 6 formats (Word, PDF, XMind, FreeMind, Markdown, Plain text) or as PNG/JPG images. Use it however you need.
Secure API authentication
Firebase token-based authentication and per-user rate limiting keep the service stable and control who can access your documents.
Patented technology
Our AI structuring technology is backed by 2 registered patents. The core engine isn’t a simple AI summary — it’s a thinking method we’ve refined over time.
Technology built on research
BrainTooler was developed through a government-funded R&D program,
and we keep refining it together with university labs and classrooms.
Korea University HI AI Lab
MOU and joint R&D on AI structuring algorithms
Hanyang University, Dept. of Educational Technology
Collaboration on research into AI in education and on validating its effectiveness
“R&D Didimdol” startup growth program
Selected for an R&D support program of Korea’s Ministry of SMEs and Startups to develop the technology
Data Voucher program
Carried out a data utilization project supported by Korea’s Ministry of Science and ICT
2 registered patents
Holds 2 patents on AI-based document structuring technology
Reflected in authorized textbooks
The Saenggak Coding structuring method is reflected in 3 authorized middle-school textbooks
A learning method studied in a master’s thesis
The Saenggak Coding structuring method behind BrainTooler was the research topic of a master’s thesis at Korea University. We carried the procedure laid out in that thesis straight into BrainTooler’s structuring engine.
Structuring dataset entries
Registered patents
Authorized textbooks
Government programs
Start with a single document
Watch a complex document turn into a structure you can take in at a glance —
try it yourself. It’s free.