Diagram Studio
Draw it or describe it
A lightweight Visio-style canvas for flowcharts, UML, ER models, cloud architecture and mind maps — plus instant diagrams from Mermaid text.
Diagramming moved to the cloud almost completely, which means the average architecture diagram, network map and org chart now lives on somebody else’s infrastructure. Those are three of the documents an organisation would least like to hand over: a map of its systems, its attack surface, and its staff.
This is a diagram editor that runs in the browser and saves nothing to a server. Shapes and connectors are held as a document model and drawn as vectors, so a diagram stays sharp at any zoom and exports at any size.
10 tools · all client-side
Which one do I need?
- A process with branches and exceptions
Flowchart Maker - A database schema
ER Diagram Tool - Infrastructure, for a design review
Cloud Architecture Diagram - A network topology
Network Diagram Tool - Who reports to whom
Org Chart Maker - A process with several departments in it
Process Diagram Maker - Thinking, before any structure exists
Mind Map Maker - I would rather write it than draw it
Text to Diagram
Worth knowing
A diagram defined as text can be reviewed in a pull request and regenerated when the system changes; one drawn by hand gives you control over exactly how it looks. Both are here for that reason. If a diagram documents something that changes, keeping its source next to the thing it describes is what stops it going quietly out of date.