Description:
Nu Markup Checker: command-line and server HTML validator
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Type: Formula
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Latest Version: 25.12.26@0
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Tracked Since: Dec 15, 2025
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Links:
Homepage |
formulae.brew.sh
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Category: Developer tools
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Tags:
html
validator
web-standards
html5
quality-assurance
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Install:
brew install vnu
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About:
VNU is the official Nu Markup Checker, a command-line tool and web service for validating HTML, SVG, and MathML documents. It checks markup against web standards to ensure correctness and accessibility. The tool provides detailed error reporting to help developers fix issues quickly.
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Key Features:
- Validates HTML5, SVG, and MathML documents
- Provides detailed, actionable error messages
- Runs as a command-line tool or standalone web service
- Configurable validation rules and output formats
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Use Cases:
- CI/CD pipeline validation for web projects
- Quality assurance for HTML templates and components
- Debugging HTML rendering issues in web applications
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Alternatives:
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html5validator
– Python-based validator, often faster but less comprehensive than VNU
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W3C Validator
– Online service, requires network access and has rate limits
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Version |
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Change |
Commit |
| Dec 27, 2025 2:56am |
25.12.26 |
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VERSION_BUMP |
8a268c83 |
| Dec 25, 2025 3:09am |
25.12.24 |
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24792980 |
| Dec 24, 2025 3:09am |
25.12.22 |
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495fff76 |
| Dec 22, 2025 8:22am |
25.12.21 |
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1e0ba989 |
| Dec 21, 2025 3:07am |
25.12.20 |
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bc68a005 |
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25.12.19 |
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f94753ff |
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