Free tools
Check a site in ten seconds
Type a domain. No signup, nothing installed, and it answers the two questions that catch most sites out: can a machine read your files, and is a cache serving something your server stopped producing.
Or take the scripts
The same two checks, for a terminal. These are the ones we run.
Neither is a product. They are the checks that caught real failures on this project, published because a post describing a tool you cannot have is an advertisement.
cachecheck.sh
Asks whether a cache is serving a document your origin no longer produces. It ignores status codes entirely: a PURGE that returns 200 has proved something answered, not that anything was evicted. It fetches the bare URL and a cache-busted one and compares them, and refuses to judge when either reading is a challenge page.
View or download it → · curl -sO https://crawlcheck.io/tools/cachecheck.sh
verify.sh
Checks whether a change you deployed is actually on the page a stranger receives. It counts your markup outside style and script tags, so a class name sitting in a stylesheet cannot pass as an element on the page; it fetches three times so anything conditional shows up; and it states that it measures the anonymous view.
View or download it → · curl -sO https://crawlcheck.io/tools/verify.sh
Use them, change them, no attribution needed. They make no network request anywhere except the URL you hand them.