Choose Your Plan
Whether for personal or professional use, we have the right plan for you
Choose the perfect plan for your diagramming needs. From individual creators to professional teams, we have the right solution for you.
Free to Start
Begin with 3 diagrams and AI assistance at no cost
Scale as You Grow
Upgrade to Starter or Pro when you need more features
Cancel Anytime
No long-term contracts. Change or cancel your plan anytime
Choose Your Plan
Whether for personal or professional use, we have the right plan for you
Free
Perfect for getting started
- 3 diagrams
- 5 AI conversations per day
- Low-res PNG export (with watermark)
- Basic sharing
- No version history
Starter
Most popular choice for individuals
- 30 diagrams
- 500 AI conversations per month
- High-res PNG export (no watermark)
- Unlimited sharing
- 30 version history
Pro
For professional developers
- Unlimited diagrams
- Unlimited AI conversations
- All formats (PNG/JPG/PDF/SVG)
- Advanced sharing & statistics
- 100 version history
- Personal notes & annotations
- Priority support
Frequently Asked Questions
Everything you need to know about our pricing and plans
Can I upgrade or downgrade my plan anytime?
Yes! You can upgrade or downgrade your plan at any time. Changes take effect immediately, and we'll prorate the billing accordingly.
What happens to my diagrams if I downgrade?
Your existing diagrams are safe! If you downgrade, you'll keep all your diagrams but won't be able to create new ones until you're under your plan's limit.
Do you offer refunds?
We offer a 30-day money-back guarantee for all paid plans. If you're not satisfied, contact us within 30 days for a full refund.
Is my data secure?
Absolutely! We use industry-standard encryption and security practices to protect your data. Your diagrams are stored securely and are never shared with third parties.
Can I export my diagrams?
Yes! Free users can export low-resolution PNG images with watermarks. Paid users get high-resolution exports in multiple formats without watermarks.
How does the AI feature work?
Our AI assistant helps you generate and improve Mermaid diagrams using natural language. Free users get 5 conversations per day, Starter users get 500 per month, and Pro users get unlimited conversations.
Ready to Get Started?
Join thousands of developers and teams who trust Mermaid Viewer for their diagram needs. Start free, upgrade when you need more.