seowebchecker

pub package License: MIT SEOWebChecker Official

A lightweight Dart and Flutter client SDK for automated on-page technical SEO audits, meta tag validations, heading structure inspections, and Core Web Vitals diagnostics.

Powered by SEOWebChecker.com.

Features

  • 🚀 Zero Hassle: Works across Pure Dart (CLI/backend), Flutter (Android, iOS, macOS, Windows, Linux, Web).
  • 🔍 Core SEO Checks:
    • Title Tag: Checks existence and optimal length (30-60 characters).
    • Meta Description: Validates length (50-160 characters) and presence.
    • Mobile Viewport: Verifies responsive mobile readiness.
    • Canonical URL: Detects canonical link tags to prevent duplicate indexing penalties.
    • Heading Structure: Ensures exactly one primary <h1> tag exists.
    • Image Accessibility: Detects missing alt attributes on content images.
    • OpenGraph Tags: Validates og:title and og:image for social snippet previews.
  • 📊 Scoring Algorithm: Calculates a weighted 0-100 SEO score and assigns an industry-standard letter grade (A-F).
  • ⚡ Offline & Online: Audit raw HTML markup directly in-memory, or crawl live remote web pages via HTTP.

Getting Started

In a Dart project:

dart pub add seowebchecker

In a Flutter project:

flutter pub add seowebchecker

Usage

1. Audit Raw HTML String

import 'package:seowebchecker/seowebchecker.dart';

void main() {
  const htmlContent = '''
<!DOCTYPE html>
<html lang="en">
<head>
    <title>High Ranking On-Page SEO Checklist & Guide</title>
    <meta name="description" content="Master technical on-page SEO, heading structure, and Core Web Vitals optimization with our comprehensive developer checklist.">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="canonical" href="https://example.com/guide">
    <meta property="og:title" content="High Ranking On-Page SEO Checklist">
    <meta property="og:image" content="https://example.com/og.jpg">
</head>
<body>
    <h1>On-Page Technical SEO Essentials</h1>
    <p>Optimize your website performance and search rankings.</p>
    <img src="chart.png" alt="SEO Traffic Growth Chart">
</body>
</html>
''';

  final result = auditHtml(htmlContent, url: 'https://example.com/guide');

  print('Overall Score: ${result.score.overall}/100 (Grade ${result.score.grade})');
  print('Checks Passed: ${result.passedChecks}/${result.totalChecks}');
  print('Warnings: ${result.warnings}, Errors: ${result.errors}');

  for (final issue in result.issues) {
    print('  [${issue.severity.name.toUpperCase()}] ${issue.title}: ${issue.message}');
  }
}

2. Audit a Live Remote URL

import 'package:seowebchecker/seowebchecker.dart';

Future<void> main() async {
  final auditor = Auditor(
    userAgent: 'MyCustomCrawler/1.0 (+https://seowebchecker.com)',
  );

  final result = await auditor.auditUrl('https://example.com');
  print('Audited: ${result.url}');
  print('Score: ${result.score.overall}/100 (${result.score.grade})');
}

Additional Resources

License

MIT © 2026 SEOWebChecker.com.

Libraries

seowebchecker
Lightweight client SDK and diagnostic suite for automated on-page technical SEO audits, meta tag validations, heading structure inspections, image accessibility checks, and Core Web Vitals diagnostics.