MermaidCreator vs MermaidEditor.io
Two free AI Mermaid editors with a similar surface. The real difference is what happens after the first draft — one-shot generation, or diagrams that stay current with your code.
On the surface these look alike: a free in-browser editor, AI generation, templates, and PNG/SVG/PDF export. The difference is depth of workflow. Most AI Mermaid editors generate a diagram once and stop. MermaidCreator is built for the whole lifecycle — draft with AI, edit visually or in code, save and share — and, on connected repos, generate an architecture diagram that refreshes itself as you merge. If you want diagrams that stay alive instead of going stale, that's the wedge.
| Capability | MermaidCreator | MermaidEditor.io |
|---|---|---|
| Free in-browser editor + live preview | Yes | Yes |
| AI generation | Yes — Claude | Yes |
| Visual drag-and-drop canvas | Yes — writes the code for you | Editor-focused |
| Templates & export (PNG/SVG/PDF) | Yes — PDF on Pro | Yes |
| Workspaces, roles & collaboration | Yes — shared workspaces on Max | Limited |
| Architecture diagrams from a GitHub repo | Yes | No |
| Diagrams that auto-refresh as you merge | Yes — living sync on Max | No — one-shot generation |
Where MermaidEditor.io wins
- A familiar, capable free editor with AI and templates.
- Simple, price-sensitive positioning if all you need is one-off generation.
Where MermaidCreator wins
- Repo-connected architecture diagrams that refresh themselves as you merge.
- A diagram of what each PR changes, posted in the thread, on Max.
- Shared workspaces, roles, and version history for teams.
Frequently asked questions
- What does MermaidCreator do that a one-shot AI editor doesn't?
- Most AI Mermaid editors generate a diagram once. MermaidCreator covers the whole lifecycle — draft, edit visually or in code, repair, save, and share — and on connected GitHub repos it generates an architecture diagram that regenerates itself as you merge, so it doesn't go stale.
- Are both free?
- Both have a free tier. MermaidCreator is free for the editor, live preview, PNG/SVG export, share links, up to 10 saved diagrams, and 5 AI generations a month; Pro ($9/mo) unlocks unlimited AI and diagrams, and Max adds team and repo-automation features.
- Can I switch without redoing my diagrams?
- Yes. Mermaid is plain text, so you can paste your existing diagrams straight into MermaidCreator and keep going. There's no lock-in either way.
Try the difference yourself
Paste any Mermaid diagram into the free editor — no account needed — and edit it visually or with AI.
Open the free editor