AI sees structure, not just pixels
An image only has pixels, but Mermaid code exposes all branches and logical relationships. This allows AI to accurately understand, rewrite, complete, and extend your flowchart.
OpenMMD
Flowcharts better for AI to read, easy for humans to edit
Diagram workflows designed for the AI era
Flowcharts that are better for AI to read, and easy for humans to edit
You might not be familiar with Mermaid. Simply put, Mermaid is a way to generate diagrams from code. It's friendly for AI to read, but hard for humans to write by hand. OpenMMD solves this: humans create flowcharts using intuitive drag-and-drop. We then export images for humans to view, and export Mermaid code for AI to understand.
Draw intuitively without learning complex code syntax
Export PNG images to easily share with your team or add to docs
Export Mermaid code so AI can accurately understand and modify it
Export Markdown containing both a diagram preview and source code
Studio preview
Live Mermaid rendering in the landing page
Flowchart
Map product and delivery flows
Generated Mermaid
flowchart LR
A[Idea] --> B{Ready to scope?}
B -->|Yes| C[Build diagram]
B -->|No| D[Collect context]
C --> E[Review with team]
E --> F[Ship in docs]
D --> BWhy we need Mermaid
AI struggles with image flowcharts, but excels at reading Mermaid
Humans can understand an image flowchart at a glance. But if you give AI a screenshot, it has to "guess" the structure through image recognition, often misunderstanding the relationships. Mermaid, however, is structured text code. AI reads this code like its native language, knowing exactly what every node and line means.
Preserve the human drawing experience
Even though the underlying format is code, you don't need to know any code. You can drag and connect nodes just like any modern diagram tool, leaving the tedious code generation to OpenMMD.
Local-first, secure data
Diagram data is saved locally in your browser first for speed and peace of mind. When you need cloud sync, you can also store it in your own GitHub repository.
What you can export
One workflow, serving both humans and AI
OpenMMD is designed around a simple principle: you create the flowchart once, and we provide the right format for whoever needs to read it.
Export PNG images for humans
Share a polished visual with teammates, drop it into docs, or use it in slides when people simply need to see the diagram.
Export Mermaid code for AI
Give AI the exact structured text it needs to understand your logic, generate code, or help you brainstorm edge cases.
Export Markdown for both
Generate a Markdown file that contains both a human-friendly visual preview and the AI-friendly Mermaid source code.
Who it is for
Built for people who want AI-generated code and diagrams to match reality
For product managers
Draft flows visually, export Markdown, and hand the Mermaid code to AI for improved user journeys, edge cases, and acceptance criteria.
For developers
Use Mermaid as a source file for architecture, API sequence flows, and system behavior, then iterate with AI in a format it can actually manipulate.
For indie hackers and one-person companies
Move from rough thinking to diagrams, docs, prompts, and shipping decisions in one compact workflow without introducing a heavyweight diagram stack.
For Obsidian + GitHub users
Keep a repo that stores Markdown knowledge and Mermaid artifacts together, so the same repository can power your editor workflow and your Obsidian vault sync.
Storage and sync
Local-first when you want speed, repo-based when you want portability
- Diagrams are stored locally in your browser, which keeps the product fast and keeps ownership close to you.
- You can sync data into your own GitHub repository, so the storage model fits existing developer and documentation habits.
- If you already use Obsidian with a Git-based vault, the same repository can become a shared home for diagrams, notes, and Mermaid exports.
- Markdown exports make the handoff especially clean for AI agents, repo readers, and future-you.
Audience fit
Especially useful for product, engineering, and solo teams building with AI
Who tends to get the most value
Product managers who want diagrams AI can help revise instead of merely describe
Developers who need Mermaid code they can store, diff, reuse, and generate from prompts
Indie hackers and solo founders building faster with AI-assisted specs and documentation
Teams using Obsidian, GitHub, and Markdown as the source of truth for product knowledge
Give AI the diagram format it can actually work with
OpenMMD helps you keep diagrams visual for people and structured for AI. That is the sweet spot for modern product work, development workflows, and one-person companies moving fast.