23 free tools for SEO, AEO and GEO

Meta Tag CheckerCheck title, description, canonical, robots and viewport tags in seconds. Heading Structure CheckerView the H1–H6 outline of any page and spot missing or duplicate H1s. Keyword Density CheckerFind the top words and phrases on a page and where they appear. Readability CheckerPaste text to get a Flesch reading score, grade level and long-sentence warnings. SERP Snippet PreviewWrite a title and description and preview them as a Google result on mobile and desktop. Open Graph CheckerPreview how a link looks when shared on Facebook, LinkedIn, X and WhatsApp. Image Alt Text CheckerList images missing alt text, lazy loading or width and height. Link AnalyzerCount internal, external and nofollow links and find vague anchor text.

Robots.txt CheckerRead and test robots.txt rules for Google, Bing and AI crawlers. XML Sitemap CheckerFind and validate a site’s XML sitemap and list its URLs. Redirect CheckerTrace every redirect hop with status codes to the final URL. DNS LookupSee A, AAAA, MX, NS, TXT and SOA records, plus SPF and DMARC. Domain Age CheckerEstimate a domain’s age and global popularity rank.

Robots.txt GeneratorBuild a robots.txt with your sitemap and AI crawler choices. llms.txt GeneratorCreate a well-formed llms.txt for your site in a minute. Schema Markup GeneratorGenerate Organization, LocalBusiness and FAQPage JSON-LD. Meta Tag GeneratorGenerate title, description, Open Graph and Twitter tags.

SSL Certificate CheckerCheck certificate validity, issuer, expiry date and HTTPS redirect. Security Headers CheckerTest HSTS, CSP, X-Frame-Options and other protective headers. Page Speed CheckerRun Google Lighthouse for Core Web Vitals and speed fixes.

AI Crawler Access CheckerSee if GPTBot, ClaudeBot, PerplexityBot, Google-Extended and others can read your site. llms.txt CheckerCheck if a site has llms.txt and whether it follows the format. Schema Markup CheckerDetect JSON-LD and microdata types, broken blocks and missing entity markup.