// Free SEO Diagnostics
Two tools for the moment your traffic moves.
Check whether a Google algorithm update was live on the day things changed, then check the authority of your own domain — or a competitor’s — to see how it’s trending.
Update Impact Checker
Enter the date your rankings or traffic shifted. We’ll check it against every confirmed Google core, spam, and Discover update — including rollout severity and how far along it was.
Domain Authority Checker
Look up any domain’s authority score. Useful right after an update — a real drop shows up here too, not just in rankings.
Authority is scored 0–100, scaled from the open web link graph (Open PageRank methodology) — a different underlying dataset than Moz DA or Ahrefs DR, but the same familiar scale and the same signal: how much of the web links to a domain.
Browse by topic
Beyond the tools — guides, breakdowns, and analysis organized into three focus areas.