| What it does | A notebook-style editor for building interfaces with Tailwind
| Free JSON API for construction calculators with test vectors and building codes
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| Stage | MVP
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Freemium
| Open source
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| Pricing | Free: $0/mo (unlimited public projects, 100s of pre-loaded components, pre-loaded asset libraries, AI accelerations, unlimited HTML export). Frontend: $7/mo (35% off when billed yearly, includes everything in Free plus private projects, theming & styling, export to Figma, unlimited React export, liv
| Free under CC BY 4.0 licence
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| Key features | - Instant preview and live updates at every keypress
- One-click deployment
- Hundreds of pre-loaded components from Radix, shadcn/UI and Layouts UI
- Built-in asset libraries for illustrations, icons, images and videos
- AI assistance for generating Tailwind utility classes
- Export to production-grade HTML and React code
- NextJS CLI integration for syncing code to projects
- Real-time visual and code preview on multiple devices
- Export to Figma (Frontend plan and above)
- Private projects (Frontend plan and above)
| - 1,173 construction calculators with full inputs and test vectors
- 3,485 published test vectors for validation
- No authentication key or rate limits required
- Citations to building standards with section numbers
- Executable API for running calculations on request
- MCP server integration for AI assistants
- 79 job takeoffs with calculator sequences
- Cross-market glossary in US, Canadian, UK and Australian usage
- Corrections ledger tracking confirmed errors
- Unit conversion with exact statutory factors
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| What makes it different | - No setup, deploy, or servers required
- Simpler, more readable syntax than HTML and React with superpowers
- Accessible to both designers and developers with minimal learning curve
- Instant results at every keystroke with live preview on all screens
- Complete visual development environment with pre-built components eliminating wheel reinvention
| - No API key required with no rate limits or quotas
- CC BY 4.0 licence allows commercial use and redistribution
- Every calculation cited to specific building code sections
- Pinned test cases prevent silent changes to published figures
- Complete accessibility with CORS support for browser use
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 12 ▲ +1 (up) since last check | Not checked yet |
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| Trust Flow (Majestic) | 9 | 0 |
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| Citation Flow (Majestic) | 22 | 26 |
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| Referring domains (Majestic) | 134 | 29 |
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Layouts.dev
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