Free tool · 40 checks

Free SEO checker for your website

Enter your domain and get a free website SEO audit in about a minute: a score and the most important issues. 40 technical checks — indexing, redirects, meta tags, schema, speed, security and AI crawlers.

We check the home page. Nothing on your site is changed.

What we check

40 technical SEO checks

  1. Meta TagsTitle, description, and other meta tags
  2. PageSpeedCore Web Vitals and performance metrics
  3. CanonicalCanonical URL configuration
  4. IndexabilitySearch engine indexability
  5. HeadingsHeading structure (H1-H6)
  6. AI Crawler AccessAI search-crawler access in robots.txt (OAI-SearchBot, Claude-SearchBot, PerplexityBot)
  7. AnalyticsAnalytics tools detection
  8. ImagesImage optimization and alt text
  9. Internal LinksInternal linking structure
  10. Mobile FriendlyMobile-friendliness and viewport configuration
  11. Rendered DOM ConsistencyRaw HTML compared with the rendered DOM for content, canonical, robots, and internal links
  12. Render ReadinessContent present in raw HTML (visible to non-JS AI crawlers)
  13. SSL CertificateHTTPS and SSL certificate status
  14. Content LengthContent length analysis
  15. Open GraphSocial media meta tags
  16. RedirectsRedirect chain analysis
  17. SecurityAdvanced security headers
  18. URL StructureURL format and readability
  19. AccessibilityAccessibility features
  20. BreadcrumbsBreadcrumb navigation
  21. Googlebot Fetch LimitUncompressed response size against Googlebot's 2 MiB text and 64 MiB PDF limits
  22. Robots.txtRobots.txt file configuration
  23. SitemapXML sitemap availability and structure
  24. Discover Image ReadinessLarge representative images, image metadata, and max-image-preview policy
  25. LanguageLanguage declaration
  26. PaginationPagination implementation
  27. Schema.orgStructured data markup
  28. FaviconFavicon availability
  29. Intrusive InterstitialsConservative raw-HTML detection of blocking promotional overlays
  30. Resource HintsPreload and prefetch hints
  31. W3C ValidationHTML validation
  32. Error PagesCustom error pages
  33. HTTP HeadersHTTP security headers
  34. HTTP RevalidationETag and Last-Modified conditional request behavior
  35. CMS DetectionContent management system detection
  36. HreflangLanguage and regional targeting
  37. External Bot/WAF DiagnosticInformational synthetic User-Agent comparison for observed CDN/WAF response differences; provider identity is not verified
  38. Google Search profile badgeOptional link to the business's Google Search profile (US, Canada, India; 10k+ followers or a knowledge panel)
  39. LLMs.txtOptional llms.txt discovery document (informational)
  40. Google Preferred SourcesOptional official button or deeplink that helps readers select an eligible publication
Guide

Free SEO checker: what a website SEO audit tells you

A website SEO audit looks at your site the way a search engine does before it decides whether to rank it. This free SEO checker loads your home page, reads its HTML, HTTP headers and public files such as robots.txt and the sitemap, and runs 40 technical checks. In about a minute you get a score out of 100 and the issues that matter most, with no account needed.

What a technical SEO check covers

Technical SEO is the layer under your content. When it breaks, even good pages stay invisible. The SEO analyzer groups its checks around the questions search engines ask first:

  • Crawling and indexing. robots.txt, meta robots, canonical tags and the XML sitemap decide whether the page can appear in search results at all.
  • Addresses and HTTPS. Redirect chains, the SSL certificate and clean URLs affect how search engines reach the page and which version they keep.
  • On-page signals. The title, meta description, headings, language tag and Open Graph tags tell search engines and social networks what the page is about.
  • Speed and mobile. Core Web Vitals and the mobile layout show how the page feels to real visitors.
  • AI search readiness. Structured data, content in the raw HTML and access for AI crawlers such as OAI-SearchBot and PerplexityBot affect whether AI assistants can read and cite your site.

Why check your website’s SEO regularly

Most technical problems are invisible in a browser. A plugin update adds a noindex tag, a redesign drops the canonical, a new security rule blocks crawlers. The site looks the same to you while it quietly drops out of search. A quick check catches these mistakes before they cost traffic, and it is the fastest way to see whether a ranking problem is technical or a matter of content.

How to read the score and what to fix first

The score out of 100 sums up all checks in one number. Use it to compare before and after a fix rather than as a grade. Work through the findings in this order:

  1. Unblock indexing first. noindex tags, robots.txt rules, wrong canonicals and broken redirects. Until these are right, nothing else counts.
  2. Then site-wide problems. HTTPS, page speed and the mobile layout affect every page at once.
  3. Then the details. Titles and descriptions, headings, structured data and image alt text.

Each finding in the report explains what is wrong and how to fix it, so you can pass it straight to your developer.

From a one-off check to SEO that runs itself

This tool checks one page, once. SERP Agent promotes the whole site in search, continuously and automatically: it builds an SEO strategy, writes and publishes articles for the searches your customers use, prepares content for answers in AI search such as ChatGPT, Perplexity and Gemini, and tracks your rankings and AI mentions. Regular audits of the site turn new findings into clear tasks for your team.

See everything SERP Agent does →

FAQ

SEO audit questions, answered

Is the audit really free?
Yes. You see the score and the most important issues right away, and the full report comes to your email for free. No account and no card.
What exactly does it check?
The home page of your site against 40 technical points: whether search engines can crawl and index it, redirects and HTTPS, meta tags and headings, structured data, speed (Core Web Vitals), security headers, and access for AI search crawlers. The full list is below.
Why do you ask for my email?
The full report is sent as a private link. Opening it confirms the address is yours, so nobody can read the report of your site with a made-up email.
How long does it take?
Usually under a minute. Slow sites or sites that block automated requests can take longer, and some checks may come back as "could not check".
Does it change anything on my site?
No. It only reads public pages and files, the same way a search engine does.

Automated SEO promotion for your site

SERP Agent builds your SEO strategy, writes and publishes the content that brings visitors from Google and AI search, and tracks how the site grows — automatically.

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