Free website and SEO tools
Test your website for speed and Core Web Vitals, validate structured data and schema markup, check HTML and CSS, inspect meta tags and Open Graph, check redirects, HTTP status and broken links, and look up headers, SSL, DNS and WHOIS: free tools for web builders and SEOs.
16 free functions, tried by us
Test website speedMeasure how fast a web page loads and get improvement tips from Google.Tool: PageSpeed InsightsTest Core Web VitalsShows the Core Web Vitals of a page: main content load time, layout shifts and responsiveness.Tool: PageSpeed InsightsTest structured dataCheck whether the structured data (schema.org) on a page is correct.Tool: Schema Markup ValidatorValidate schema markupValidate schema.org markup (JSON-LD, Microdata, RDFa) of a page or code snippet.Tool: Schema Markup ValidatorValidate HTMLCheck whether your HTML is valid according to the standard.Tool: W3C Nu HTML CheckerValidate CSSCheck whether your CSS is valid.Tool: W3C CSS Validator
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SERP snippet previewChecks whether your title and description stay within the recommended length for search results.Tool: OpenGraph (meta-tag inspector)Check meta tagsReads the meta and Open Graph tags of a page and gives tips for improvement.Tool: OpenGraph (meta-tag inspector)Open Graph previewShows what a link looks like when you share it on social media.Tool: OpenGraphCheck redirectsShows every redirect of a web address, step by step.Tool: httpstatus.ioCheck HTTP statusCheck the HTTP status code (200, 404, 301...) of one or more web addresses.Tool: httpstatus.ioCheck broken linksFinds links on a page that no longer work.Tool: W3C Link Checker
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Check website headersChecks the security headers of a website and gives it a grade.Tool: Security HeadersCheck SSL certificateTests the SSL/TLS certificate and security configuration of a server.Tool: Qualys SSL LabsCheck DNS recordsLook up the DNS records of a domain (A, MX, TXT, NS...).Tool: Google Admin Toolbox - DigWHOIS lookupLook up the registration details of a domain (registrar, dates, nameservers).Tool: ICANN Lookup
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