Free SEO & performance tools
Paste a URL and get one clear answer. 15 tools, each checking one thing properly: whether Google can index a page, which AI crawlers you are letting in, what a real browser sees that a crawler does not, and how fast your pages are for the people actually visiting them.
Crawling & indexing
Whether Google can reach a page, whether it can index it, and how it looks in the results once it does.
These tools answer once. Monitoring answers every day.
VitalSentinel watches the signals that move on their own – uptime, Core Web Vitals, indexing and robots.txt – on a schedule, and tells you the moment one of them changes.
Free plan, no credit cardPerformance & Core Web Vitals
How fast your pages really are for the people visiting them, measured by Chrome over the last ten months, and how that compares with competitors you pick.
AI & agents
Which AI crawlers you let in, and whether an AI agent arriving at your site finds what it needs to actually use it.
Rendering & JavaScript
What a real browser sees that a plain page fetch does not: the SEO tags your JavaScript adds, and the cookies set before anyone clicks accept.
Security & headers
What your live headers say about security, HTTPS and caching, and where a policy that looks strict has a hole in it.
Stop running these checks by hand
Uptime and SSL, Core Web Vitals from real users, indexing status and robots.txt, checked on a schedule and alerted on the moment they change. Start on the free plan and add your first domain in under a minute.