Free tools
Free website checkers
These checks are free, need no sign-up and run from your browser. Pick one, enter your address and read the result on the page.
Free website scan
Checks speed, SEO, HTTPS, security headers and tech stack, then shows what's wrong. Start here if you're not sure what to look at. It asks for your email so it can send you a copy of the report.
Check all pages
Reads your sitemap and lists pages that return 404, redirect or carry noindex, plus homepage links missing from the sitemap. Useful after a redesign or a migration.
WordPress plugin checker
Shows which plugins and versions anyone can spot from outside, and whether any match a known security issue. For anyone running WordPress.
PHP2Shell scanner
Checks whether your server reports a PHP version at or above the 21 October fixes for CVE-2026-109618. Run it if your site runs on PHP.
SPF and DMARC checker
Reads your domain's email records and says in plain words whether fake mail sent in its name would be blocked, flagged or delivered. For any domain that sends email.
Security headers checker
Grades HSTS, CSP, X-Frame-Options and three more headers, with the exact line to add for each one that's missing. Handy after a server or hosting change.
Prefer to look yourself? The WordPress self-check lists 10 things you can check in 15 minutes with a browser and your WordPress login.
Questions
Are these checks really free?
Yes. Every check on this page is free, and there's no limit on how many sites you look at.
Do I need to give my email?
Not for five of them. The page check, plugin checker, PHP2Shell scanner, SPF and DMARC checker and headers checker show their results on the page and ask for nothing else. The full free scan does ask for an email address, because it sends you a copy of the report. The report also shows on the page while you wait. We don't sell the address, and every email has an unsubscribe link.
Which check should I run first?
The free website scan. It covers the most ground, and its report points you to the other checks when they'd help.
What happens after a check finds a problem?
The report explains each problem and how to fix it. You can fix it yourself, or ask us to do it.