SEO Checker

Analyze your website's search engine optimization with a comprehensive technical SEO audit. Identify issues and get actionable fixes.

Free • No Registration • Lighthouse Powered

What Is an SEO Checker?

An SEO checker evaluates your website against search engine best practices to identify technical issues that may be preventing you from ranking higher. Our SEO checker analyzes over 40 different on-page and technical SEO factors, from meta tags and heading structure to structured data and link crawlers.

W3Test's SEO Checker provides a score from 0 to 100 based on how well your site is optimized. It highlights issues by severity and provides actionable recommendations to fix each problem.

What Does the SEO Checker Analyze?

Meta Tags

Checks title tags, meta descriptions, and canonical URLs for proper length and best practices.

Heading Structure

Verifies hierarchical heading usage (H1, H2, H3) and ensures correct content organization.

Structured Data

Detects schema.org markup that helps search engines understand your content.

Link Analysis

Analyzes internal and external links, broken links, and link text optimization.

Image Optimization

Checks for alt text on all images for accessibility and image SEO.

Mobile Friendliness

Assesses mobile viewport configuration and tap target sizing.

Why Is Technical SEO Important?

Technical SEO forms the foundation of your search visibility. Even with great content, technical issues like broken links, missing meta descriptions, or poor site structure prevent search engines from crawling and indexing your pages effectively. A strong technical SEO setup ensures search engines can discover, understand, and rank your content.

Common SEO Issues Detected

  • Missing or duplicate title tags - Each page needs a unique, descriptive title.
  • Missing meta descriptions - Search snippets rely on these to attract clicks.
  • Multiple H1 tags - Pages should have exactly one H1 heading.
  • Broken links - 404 errors hurt user experience and crawl efficiency.
  • Missing alt text - Images need descriptive alternative text.
  • Non-descriptive anchor text - Links should describe where they lead.
  • Missing robots.txt or sitemap.xml - Both help search engines crawl efficiently.
  • Blocked resources - JS/CSS blocked from crawling can hurt indexing.

How to Improve Your SEO Score

  1. Run the SEO checker and review each failed audit in the report.
  2. Fix critical issues first - they have the biggest impact on rankings.
  3. Write unique title tags and meta descriptions for every page.
  4. Ensure a logical heading structure with a single H1.
  5. Add descriptive alt text to all images.
  6. Submit and verify an XML sitemap in Google Search Console.
  7. Fix broken internal links and simplify your URL structure.
  8. Re-run the SEO checker to verify improvements.

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