// definition
Crawlability
Crawlability is whether search and AI crawlers can reach and fetch your pages and the CSS and JavaScript they need. Block those resources and you lose ranking.
What it is
Crawlability is whether a crawler can actually reach a page on your site and download it. Before anything can rank, Googlebot has to find the URL, request it, and get a usable response back.
It is not only about the HTML. Google says it must be able to access the same CSS and JavaScript files your visitors load, because it renders the page the way a browser does before deciding what is on it. Block those resources in robots.txt and you hand Google a half-built page.
Crawlability is the first link in the chain Google describes as crawl, then index, then serve. Break it and the rest never happens.
Why it matters
If a crawler cannot fetch a page, it cannot rank, and it cannot feed Google's AI features, which draw from the same index. A page nobody can reach is invisible.
The common own-goals are quiet ones: a stray Disallow rule covering your /assets/ folder, a CDN that 403s unknown user agents, a JS bundle blocked from the crawler so the rendered page comes back nearly empty. None of these throw an error you would notice. They just suppress what Google sees.
Crawlability is what lets a fetched page move on to indexing. Get it right by making sure Google can fetch your pages and every resource they depend on, per Google's SEO starter guide.
// related terms
// next step
See how legible your site is to AI.
Free first audit. No credit card. Your Legibility Score in under two minutes.