# Pricing

> Free forever for unlimited diagrams; Pro unlocks SVG/PDF, full-scale PNG, sharing, and cloud history.

Canonical: https://unidiagram.davidtran.dev/pricing

## Free — $0 forever

- Unlimited diagrams
- Mermaid, PlantUML, D2, and Graphviz engines
- Local history only
- Standard export: no SVG or PDF
- Standard copy/download: 0.5x PNG only
- No share diagram feature
- No cloud history sync
- No priority support

## Pro — $5/month or $30/year

Yearly is about $2.50/month (50% off vs monthly).

- Everything in Free
- Export clean SVG and PDF
- High-resolution PNG at full scale
- Share diagram feature
- Cloud history sync
- Priority support

## Compare

| Feature | Free | Pro |
| --- | --- | --- |
| Unlimited diagrams | Yes | Yes |
| Mermaid, PlantUML, D2, Graphviz | Yes | Yes |
| Local history | Yes | Yes |
| Cloud history sync | No | Yes |
| Clean SVG and PDF export | No | Yes |
| High-resolution PNG (full scale) | No (0.5x only) | Yes |
| Share diagram | No | Yes |
| Priority support | No | Yes |

## FAQ

### What is UniDiagram?

UniDiagram is a web-based code-to-diagram editor for Mermaid, PlantUML, D2, and Graphviz. Create architecture diagrams, flowcharts, and sequence diagrams from plain text.

### Can I use UniDiagram for free?

Yes. Free includes unlimited diagrams, standard-scale PNG export (0.5x), and local browser history.

### What does Pro unlock?

High-resolution SVG and PDF exports, full-scale PNG, sharing, and cloud history sync across devices.

### Can I cancel anytime?

Yes. Manage or cancel from the customer billing portal in your profile menu.

### Are diagrams private?

By default diagrams stay in local browser history. Shared diagrams are stored in the cloud and reachable only via the share link.

### Refund policy

Contact support within 7 days of purchase for a full refund.

## Related

- Home: https://unidiagram.davidtran.dev/index.md
- Contact: https://unidiagram.davidtran.dev/contact.md
- App: https://unidiagram.davidtran.dev/app