Domain Authority Checker — Free Online Tool

What Domain Authority Checker does

Domain Authority is a third-party metric, developed by Moz, that scores a website's overall link-based ranking strength on a 1-to-100 scale. This tool looks up a domain's current Domain Authority, Page Authority and Spam Score directly from Moz's own data.

How to check a domain's authority

Enter the domain you want to check.
Select Check Domain Authority.
Review the Domain Authority, Page Authority and Spam Score reported.

What Domain Authority actually measures

DA is calculated from the quantity and quality of backlinks pointing to a domain — it is Moz's own predictive model, not a metric Google itself publishes or uses directly in ranking. It's best used as a comparative gauge: useful for comparing your site against competitors or tracking your own progress over time, not as a literal measure of how Google will rank you.

Using the number sensibly

A newer or smaller site will naturally have a lower DA simply from having fewer backlinks — that's expected, not a sign something is broken. Rather than fixating on the number itself, check it periodically to see the trend: a DA that's climbing over months generally reflects a genuinely growing backlink profile.

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Is Domain Authority a Google ranking factor?

No — Google has stated it doesn't use Domain Authority. It's Moz's own third-party metric, useful as a comparative gauge of link-based strength, not a direct signal in Google's actual ranking algorithm.

Why does my DA differ from what another tool reports?

Different SEO tools calculate their own proprietary authority metrics using different data and formulas, so a Moz DA score won't match Ahrefs' Domain Rating or Semrush's Authority Score exactly — they aren't measuring the same thing.

What's a 'good' Domain Authority score?

It's relative — compare your score against direct competitors in your niche rather than against an absolute number, since DA scales vary enormously by industry and site age.

Can Domain Authority go down?

Yes — losing backlinks, or competitors gaining them faster than you, can lower your relative DA score, since it's recalculated periodically against the wider web.

What does Spam Score indicate?

It's Moz's estimate of how closely a domain resembles sites that have been penalized, based on known spam signals — a high score is worth investigating, though it isn't a direct penalty from Google.

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