Privacy Policy
Last Updated: October 31, 2025
Privacy at a Glance
- Your data stays in your browser - Everything is stored client-side using IndexedDB
- No user accounts or tracking - No registration, no login, no user profiles
- No server-side storage - We don't store your diagrams or data on our servers
- Anonymous analytics only - Vercel Analytics collects anonymous page views (no personal data)
What We Collect
Nothing by Default
VennMaker does not collect, store, or transmit any personal information or user-generated content to our servers. All your Venn diagrams, labels, and preferences are stored exclusively in your browser's local storage.
Anonymous Web Analytics
We use Vercel Analytics to understand how people use VennMaker. This service collects:
- Page URLs visited (e.g., homepage, privacy page)
- Referrer information (where you came from)
- Country and device type (anonymized)
- Page load times and performance metrics
No personal information is collected. We don't track IP addresses, user identifiers, or link analytics data to any individual.
How Your Data Is Stored
Client-Side Storage Only
All application data is stored locally in your browser using two technologies:
IndexedDB
Stores your diagram history - a record of all the Venn diagrams you've created or modified. This allows you to view and restore previous versions of your work.
localStorage
Stores your current diagram state and application preferences. This ensures your work is saved automatically and restored when you return to VennMaker.
What this means for you: Your data never leaves your device. We cannot access, view, or recover your diagrams. If you clear your browser data, your diagrams will be permanently deleted.
Your Rights & Control
Since all data is stored in your browser, you have complete control:
Access Your Data
View all stored data via your browser's developer tools (Application → IndexedDB → vennmaker.io)
Delete Your Data
Clear all VennMaker data via browser settings (Clear browsing data → Cookies and site data)
Export Your Work
Use VennMaker's built-in export features to save diagrams as PNG, SVG, or PDF files
No Account Needed
No registration means no personal data tied to your identity
Third-Party Services
Vercel Analytics
VennMaker uses Vercel Analytics for anonymous web analytics. Learn more about their privacy practices: Vercel Analytics Privacy Policy
What We Don't Use
VennMaker does not use:
- Tracking pixels or advertising cookies
- Social media trackers or plugins
- Third-party authentication providers
- AI inference APIs or machine learning services
- External databases for user data
Security
VennMaker's privacy-first architecture provides inherent security benefits:
- No server-side data breaches possible - We don't store your data, so it can't be compromised
- HTTPS encryption - All connections to VennMaker are encrypted
- No authentication system - No passwords to steal or accounts to hack
- Client-side processing - All diagram creation happens in your browser
Compliance
VennMaker's privacy-first design means we're compliant with major privacy regulations:
- GDPR (General Data Protection Regulation) - No personal data collection or processing
- CCPA (California Consumer Privacy Act) - No personal information sale or sharing
- No data breach notification required - We don't store user data server-side
Technical Details
IndexedDB Schema
VennMaker stores diagram history in IndexedDB with the following structure:
{
id: number, // Auto-incrementing ID
timestamp: number, // Unix timestamp
diagram: {
circles: [...], // Circle definitions
labels: [...], // Labels and text
// ... other diagram state
}
}localStorage Keys
vennmaker_current_diagram- Current diagram state (JSON)vennmaker_preferences- Application preferences (JSON)
All stored data is specific to the vennmaker.io domain and cannot be accessed by other websites.
Changes to This Policy
If we make material changes to our privacy practices, we will update this page and the "Last Updated" date at the top. We recommend checking this page periodically for updates.