All 12 free SEO and AI visibility tools

Every one is free and needs no sign-up. Each reads the raw HTML your server returns — the same thing a crawler sees.

• AI Visibility CheckerAI search engines only cite what they can crawl and parse. This checks your page against the signals that decide whether you show up in AI answers.
• Schema Markup CheckerPaste a URL to see every schema entity on the page, which required properties are missing, and which rich results you actually qualify for.
• Sitemap CheckerFinds your sitemap the way a crawler would — robots.txt first, then the common locations — then validates what it finds.

• SEO Title Length CheckerGoogle truncates titles by pixel width, not character count. This measures both, so a title full of capitals does not sneak past a character-only check.
• Meta Description Length CheckerMeta descriptions are not a ranking factor — Google has said so repeatedly. They decide click-through, which is why length and clarity still matter.
• Google SERP PreviewEnter a URL to see the snippet Google will show, on both desktop and mobile, with the truncation points marked.
• H1 Tag CheckerTwo H1 tags on one page is one of the most common on-page mistakes, and it is invisible until something checks for it.
• Heading Structure CheckerA clean H1→H6 outline is how screen readers navigate and how AI engines decide what a passage is about. Skipped levels break both.
• Alt Text CheckerAn empty alt="" is the correct markup for a decorative image. A missing alt attribute is a defect. Most checkers conflate the two — this one does not.
• Canonical URL CheckerConflicting canonical signals get weighted against each other and the winner is unpredictable. This shows every signal side by side.
• Redirect CheckerFollows every hop manually and reports the whole chain — most tools show you only where you landed.
• OG Image Checker & Twitter Card ValidatorThis has no effect on rankings. It decides whether a shared link renders as a full-width image or a bare grey text row.