How to build a scheme / architecture / structure of the site?

Question

Web development

Could you please tell me a tool in which you can build the site structure (sections, pages) and describe each of them.
I imagine the structure in the form of a mind map, where you can go to the selected section and enter a description, subsections, functions, notes, etc. there.

Answer 1

https://www.draw.io/ - free, has all the tools, export to pdf, googleDocs, etc.

Answer 2

Edraw Mind Map (Free)

Answer 3

definitely here https://www.mindomo.com/en/

Answer 4

I recommend this service - mindmeister.com - it has everything you need to solve your problem.