Enter any site and get a one-off audit — response code, headers, and the
presence & status of its well-known files (robots.txt,
sitemap.xml, /.well-known/*, manifest.json,
ads.txt…). No signup.
Public http/https sites only — loopback, private, and link-local targets are refused. Runs are rate-limited to prevent abuse.
Freeze an audit as an immutable snapshot, then diff two to see exactly what changed — broke / fixed / dropped headers / content drift / score delta. Snapshot IDs live in this browser.
Discover a domain's most significant pages (via sitemap.xml / robots.txt,
ranked by priority; homepage links as a fallback), audit each, and check every internal link for
breakage. Uses the URL from the audit box above.
Re-audit the URL above on a schedule; each run is diffed against the last, the score is tracked over time, and a regression (score drop, a URL that broke, a lost CDN, or an unreachable origin) raises an alert — optionally POSTed to a webhook. Watch IDs live in this browser.