Export professional diagrams without watermarks
High-res up to 8x. AI-powered generation. No watermark.
| Feature | Free | Pro |
|---|---|---|
| Export quality | 1x with watermark | Up to 8x, no watermark |
| AI Generation | — | 200/month |
| AI Error Repair | — | 200/month |
| Cloud Sync | — | 50 diagrams |
| Themes | 3 basic | All premium themes |
| Support | Community | Priority |
Lifetime Access
Pay once, yours forever
Equivalent to ~3 months of Pro
7-day money-back guarantee · Includes all future Pro features
- Everything in Pro — forever
- No watermark on exports
- High-res exports (up to 8x)
- AI Diagram Generation (200/mo)
- AI Error Repair (200/mo)
- Cloud sync (50 diagrams)
- One-time payment, no subscription
- All future Pro features included
Or go monthly
Pro at $7/mo. Cancel anytime.
Frequently Asked Questions
Can I cancel anytime?
Yes. Cancel your subscription at any time. You’ll keep Pro access until the end of your billing period.
What payment methods do you accept?
We accept all major credit cards via Stripe. Your payment information is never stored on our servers.
What happens to my diagrams if I downgrade?
Your diagrams are always yours. If you downgrade, exports will include a watermark and scale is capped at 2x, but all your work is preserved.
What does "Lifetime" mean?
Lifetime means for the lifetime of the product. You pay once and get Pro access for as long as Mermaid Editor exists. All future Pro features are included at no extra cost.
Do you offer refunds?
Yes, we offer a 7-day money-back guarantee. Contact us if you’re not satisfied.
Is there a free trial?
Yes! Start a 7-day free trial of Pro — no charge until day 8. Cancel anytime during the trial and you won’t be billed.