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react-seo-analyzer

v2.0.1

Published

A React SEO Analyzer package with visual overlay, 20+ checks, and SEO scoring.

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

artak_harutyunyanartak_harutyunyan

Keywords

reactseoanalyzerseo-analyzermeta-tagsopen-graphaccessibility

Readme

react-seo-analyzer

npm version npm downloads bundle size license

🔍 A zero-dependency SEO linter for React apps — with a live visual overlay, 20+ checks, and an SEO score — all only in development mode.

✨ Why react-seo-analyzer?

Most React SEO tools require server-side rendering or manual auditing. react-seo-analyzer runs right inside your browser during development — giving you instant, inline feedback as you build.

| Feature | react-seo-analyzer | Lighthouse | Other libs | |---|---|---|---| | Dev-mode overlay | ✅ | ❌ | ❌ | | SEO score | ✅ | ✅ | ❌ | | 20+ checks | ✅ | ✅ | ⚠️ partial | | Zero config | ✅ | ❌ | ⚠️ | | Zero dependencies | ✅ | ❌ | ❌ | | Auto-disabled in prod | ✅ | N/A | ❌ |

🚀 Installation

npm install react-seo-analyzer
# or
yarn add react-seo-analyzer

🔧 Usage

Drop <SEOAnalyzer /> anywhere in your app. It renders nothing in production.

import SEOAnalyzer from 'react-seo-analyzer';

function App() {
  return (
    <>
      <SEOAnalyzer />
      {/* your app */}
    </>
  );
}

A floating panel will appear in the bottom-right corner showing your SEO score and all issues, grouped by category. Click the badge to collapse it.

⚙️ Props

| Prop | Type | Default | Description | |---|---|---|---| | devOnly | boolean | true | Only run in NODE_ENV !== 'production' | | overlay | boolean | true | Show the floating UI panel | | console | boolean | true | Also log issues to the browser console | | disableRules | string[] | [] | Rule IDs to skip (see list below) | | onIssues | function | — | Callback (issues, score) => void |

Examples

// Disable the overlay, use console output only
<SEOAnalyzer overlay={false} />

// Disable specific rules
<SEOAnalyzer disableRules={['missingStructuredData', 'missingTwitterCard']} />

// Use a callback for custom reporting
<SEOAnalyzer onIssues={(issues, score) => myReporter.send({ issues, score })} />

📋 Checks

🔴 Errors (–15 pts each)

| Rule ID | Description | |---|---| | missingTitle | No <title> tag found | | missingDescription | No meta description | | missingH1 | No <h1> on the page | | imagesWithoutAlt | Images missing alt attribute | | missingViewport | No viewport meta tag | | robotsNoIndex | Page is set to noindex |

🟡 Warnings (–5 pts each)

| Rule ID | Description | |---|---| | titleLength | Title outside 30–60 character range | | descriptionLength | Description outside 50–160 character range | | multipleH1 | More than one <h1> tag | | missingCanonical | No canonical link tag | | missingLang | No lang attribute on <html> | | missingOgTitle | No og:title Open Graph tag | | missingOgDescription | No og:description Open Graph tag | | missingOgImage | No og:image Open Graph tag | | externalLinksNoRel | External links missing rel="noopener noreferrer" | | headingHierarchy | Heading levels are skipped |

🔵 Info (–1 pt each)

| Rule ID | Description | |---|---| | missingOgUrl | No og:url tag | | missingTwitterCard | No twitter:card tag | | missingTwitterTitle | No twitter:title tag | | missingStructuredData | No JSON-LD structured data | | missingFavicon | No favicon link tag |

📊 Scoring

Your SEO score starts at 100 and points are deducted per issue:

Errors   → –15 pts each
Warnings → –5 pts each
Info     → –1 pt each

| Score | Status | |---|---| | 80–100 | 🟢 Good | | 50–79 | 🟡 Needs work | | 0–49 | 🔴 Critical |

🤝 Contributing

Contributions are welcome!

  • Fork the repo
  • Create a feature branch
  • Run tests: npm test
  • Submit a PR

Have a rule idea? Open an issue.

📄 License

MIT © Artak Harutyunyan