Privacy

FlowBuilder has no accounts and no database of users. Here is everything that happens to your data.

Your charts stay in your browser

Each editor saves your latest chart in your browser’s localStorage so it’s still there when you return. It never leaves your device unless you use an AI tool. Charts are drawn in your browser by the open-source Mermaid library.

AI tools

When you click Generate on the AI generator, code to flowchart or the swimlane AI, the text you typed is sent to an AI model (OpenAI, via Vercel AI Gateway) to write the chart. FlowBuilder does not store it. Your IP address is held in memory for a few minutes only to enforce a fair-use limit. Don’t paste passwords, secrets or personal data about others.

Analytics

We use Ahrefs Web Analytics, which is cookieless and doesn’t collect personal data, to count page views.

Hosting

The site is hosted on Vercel, which keeps standard server logs.