Free Website Tools
Useful tools for developers, sysadmins, and website owners. No signup required.
AI SEO Checker
NewIs your website visible to ChatGPT, Perplexity, Claude, and Gemini? Get your AI readiness score, audit crawler access, generate your llms.txt, and see where to submit your site.
Use this tool →SSL Certificate Checker
PopularCheck any SSL certificate instantly. See issuer, expiry date, days remaining, TLS version, and chain validity. Color-coded warnings for expiring certificates.
Use this tool →Uptime & SLA Calculator
Calculate allowed downtime for any uptime percentage. See how much downtime 99.9%, 99.99%, and other SLA levels actually mean in real time.
Use this tool →More tools coming soon
DNS lookup, header checker, WHOIS lookup, website speed test, and more. Sign up for free to be notified when new tools are available.
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