Professional diagrams in minutes.
Inspector-grade SLDs. Clinical genograms. ISA-5.1 P&IDs. Cap tables ready for Series A review. The diagrams ChatGPT can't draw — describe it in plain English, ready in minutes.
32 engines, one chat.
Specialist engines (•) draw the diagrams competitors can't — typed grammars, standards-compliant output. General engines (·) cover the day-to-day flowcharts, mindmaps, and timelines.
The diagrams ChatGPT can't draw.
Generic AI gives you ASCII art. Mermaid gives you a flowchart. We give you the diagram a clinician, an inspector, or an investor will accept.
Routed. Validated. Engineered.
A typed pipeline beats a hopeful prompt. Three things every diagram goes through before you see it.
Routed automatically
Your description picks the engine.
A circuit goes to schematex-circuit. A sequence goes to mermaid-sequence. A mindmap goes to markmap. You don't pick the syntax — we route by intent and serve the right grammar to the model.
Validated server-side
No broken renders ever leave the server.
If a generated DSL fails to parse, we retry server-side until it's clean. The user only sees the final, valid render — never a stack trace, never a half-drawn box, never a malformed arrow.
Engineered for precision
Each diagram type has its own grammar.
32 typed engines means each diagram type has a maintained DSL with first-class error messages — not a single general-purpose AI guessing syntax. Schematex covers the diagrams nobody else can draw.
What people draw with it.
Paraphrased from real sessions — engineering proposals, clinical assessments, B2B teams replacing tools that couldn't keep up.
“Our electrical engineers are always too busy. I needed an SLD for a customer proposal — drafted it in ten minutes.”
“Our BI tool couldn’t make a bubble matrix for license × usage. Yours did.”
“Replacing SolidWorks for preliminary P&IDs. The hydraulic schematics are surprisingly good.”
“Drafted a clinical genogram for a case assessment. Saved me thirty minutes of manual layout.”
A diagram is a contract. Every line, every arrow, every label is a claim about the system. A typed grammar is the only way to keep that claim honest.
Common questions.
What kinds of diagrams can ChatDiagram render?
Does it work for floor plans, interior design, or architectural layouts?
How is this different from ChatGPT or Mermaid?
What's the input — describe in plain English, or drop a file?
Do I need to sign up? What does it cost?
What do you need to diagram this week?
A circuit, a sequence, a system. Drop a description into the editor — we’ll route it.