Run a single check on any URL.

Find broken internal links on any website for free. Scan your site for 404 errors and dead links that hurt SEO and user experience.

Free bulk 404 checker: scan up to 10 pages of your site for 404 errors and broken links, no login required. See dead URLs and the links sending visitors to your 404 page.

Check if your page has a meta description and whether it's the right length for SEO. Free, instant results.

Check if your site is served over HTTPS and scan for mixed content issues where resources load over insecure HTTP.

Detect redirect chains and loops on any URL. Find unnecessary redirects that slow down your site and waste crawl budget.

Check if your page has a title tag and whether it's the right length for SEO. Free instant results, no signup - just paste a URL and go.

Check if your robots.txt file is accidentally blocking pages from Google or other search engines. Free instant scan, no signup required.

Check if your page has a single H1 tag. Missing or multiple H1 tags can hurt SEO. Free instant check.

Measure your Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP) for free.

Find unoptimised images and missing alt text on any webpage. Improve page speed, accessibility, and SEO with one scan.

Find images missing alt text on any webpage. Improve accessibility and SEO with this free image alt attribute scanner.

Check if your page has the required Open Graph meta tags for social media sharing. Free OG tag validator.

Check if your page has JSON-LD structured data for rich search results. Free schema markup validator.

Check if your website has essential HTTP security headers configured - HSTS, X-Content-Type-Options, and X-Frame-Options. Free instant check.

Check the DMARC record on any domain. Verify the policy (none, quarantine, reject) and find out whether your domain is protected against email spoofing. Free instant check.

Check the SPF record on any domain. See whether your domain authorises legitimate senders correctly and whether the policy strictly rejects spoofed mail. Free instant check.

Check the SSL/TLS certificate on any website. See the expiry date, issuer, and how many days remain until renewal. Free instant check.

Check how ready your site is to be read and cited by AI search engines like ChatGPT, Perplexity, and Google AI. Runs all 9 AI-visibility checks on any URL free, no signup.

Check if your site has a valid llms.txt file, whether AI crawlers like GPTBot and ClaudeBot can access it, and whether your CDN blocks them at the network level. Free instant scan.

Generate an llms.txt file for your site free. We crawl your key pages and build a valid, ready-to-publish llms.txt that helps AI assistants read and cite you.