| What it does | Micro-frontend architecture framework for composing web applications
| HTML validation API and free online validator for deployed pages
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| FR
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| Pricing model | Open source
| Freemium
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| Pricing | Not given
| Free: unlimited validators and checkers, no account required, free site scans. Solo: 49 EUR per month including full site reports and monitoring of 1 site. Agency: 149 EUR per month including monitoring of 10 sites. Automatic fixes: from 3 EUR for 10 pages, 1 free fix daily without account. Full sit
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| Key features | - Typed host and hostee SDKs for building and embedding features
- CLI for initialization, building, and development with feature.config.*
- Dev server with debug UI for inspecting host/hostee message traffic
- Multiple display modes: embedded, dialog, popup, standalone
- Contract declaration with message validation and schema enforcement
- Optional encryption with v3 and v4 protocols
- Framework-agnostic with support for React, Vue, Angular, vanilla JS
- Lifecycle management with open/close and ready state handling
- Message broker with typed routing and validation
| - Accessibility (WCAG) validation with machine-detectable failures
- HTML specification compliance checking
- Meta tags and viewport validation
- Open Graph checker
- Page weight measurement and compression analysis
- Single API endpoint with configurable checks
- Single verdict field for build pipeline integration
- Automatic AI-powered HTML fixes
- Weekly site audits with change notifications
- GitHub Actions integration
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| What makes it different | - Zero runtime dependencies and self-contained feature packages require no transitive install burden
- Modernize without a rewrite by composing existing applications of any age
- Contract-based type safety with handshake validation and fail-closed security
- Production-ready static file server with optional encryption and message inspection
| - One API call runs five checks on a single page fetch instead of five separate requests
- Single boolean verdict for build pipelines to act on without parsing prose
- False-positive filtering eliminates unreliable findings
- Quality score based on issue variety, not count, capping best-practice impact
- Free tools remain unlimited without account or daily limits
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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) | Not checked yet ● no change since last check | 9 ● no change since last check |
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| Trust Flow (Majestic) | 5 | 10 |
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| Citation Flow (Majestic) | 21 | 32 |
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| Referring domains (Majestic) | 9 | 124 |
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HyperFrontend
ValidateHTML