Visual or code: which way should you diagram?

There's a long-running debate in diagramming: should you draw with a visual canvas or write diagrams as code? Both camps are right — they're just optimizing for different moments in the work.

When the visual canvas wins

Dragging boxes around is unbeatable when you're still figuring out the shape of something:

• early brainstorming, where spatial arrangement is part of thinking;
• explaining a system to someone live, where you rearrange as you talk;
• diagrams where layout carries meaning (org charts, seating, floor plans).

The canvas gives you immediate spatial feedback that text can't.

When diagrams-as-code wins

Text pulls ahead the moment a diagram needs to live alongside code:

• Reviews — a one-line change shows up as a one-line diff.
• Version control — history, blame, and branches come for free.
• Automation — generate diagrams from data, or keep them in sync with CI.
• Portability — paste the same snippet into GitHub, docs, or a wiki.

flowchart LR
    Draft -->|sketch fast| Canvas
    Canvas -->|stays in sync| Code
    Code -->|diff in PR| Review
    Review --> Merge

You shouldn't have to choose

The trap is treating these as a one-time decision. In practice you want the canvas while you're exploring and code while you're maintaining — often within the same diagram, minutes apart.

That's exactly why MermaidCreator keeps both views bound to the same Mermaid source. Sketch a flow on the canvas, tweak a label in code, ask AI to restructure it — the underlying text is always the truth, so nothing gets stranded in a format you can't take with you.

The best diagramming workflow isn't visual or code. It's both, on the same file.