Free SEO Checker

• Indexing — HTTPS, the HTTP→HTTPS redirect, www vs non-www duplication, canonical tag, meta robots and the X-Robots-Tag header, a sitemap line in robots.txt, and whether missing pages return a real 404.
• Content — title and description length, a single H1, heading order, word count and image alt attributes.
• Performance — HTML download time and size, compression, cache headers and render-blocking scripts in the head.
• Mobile & basics — viewport, charset, page language and favicon.
• Links — internal link count, links without text and a live check of up to six internal links for 4xx/5xx.
• Sharing & schema — Open Graph, Twitter card, valid JSON-LD and breadcrumb markup on inner pages.

Every check has a weight; a warning earns half. The grade is the share of points earned: A from 90%, B from 75%, C from 60%, D from 40%. Five checks are marked critical — HTTPS, meta robots, title, H1 and viewport — because failing any one can keep a page out of search or break it on mobile, whatever the rest scores.

Timing is measured from our server, so treat download time as a relative signal, not a Core Web Vitals score. For field data use Google's PageSpeed Insights or Search Console.

AI answers are assembled from pages that search systems can crawl, index and parse. Google's AI Overviews draw on the regular Google index; other engines run their own crawlers with similar needs. A page that fails the indexing checks here is unlikely to be cited anywhere. Once the basics pass, run the AEO checker for the AI-specific layer: crawler rules for AI bots, llms.txt and content that works without JavaScript.