Privacy

Short version: no accounts, no uploads of your diagrams, and one button to wipe what’s stored in your browser.

What stays in your browser

The diagram you are working on, and any copies you save on the Saved tab, are kept in your browser’s local storage under keys starting with vennmaker:. They never leave your device unless you share a link or export a file.

Share links carry the diagram inside the link itself (after the #), which browsers don’t send to our server.

AI features

When you press Fill regions with AI or Solve step by step, the set names, optional context or word problem you typed are sent to our server and on to an AI model via Vercel AI Gateway to produce the answer. We don’t store that text, and nothing is sent unless you press the button. Please don’t type personal information into those boxes.

Analytics

We use Ahrefs Web Analytics, a cookieless analytics tool, to count page views and see which pages are useful. It does not use cookies or build a profile of you.

Hosting

The site is hosted on Vercel, which keeps standard server logs (such as IP address and time of request) for security and reliability.