Domain Authority Checker

The Domain Authority Checker by SEO Tools System is a free online tool that shows the domain authority (DA) score of any website. Enter a domain and instantly see its authority score — a useful way to gauge a site's SEO strength, compare competitors, and evaluate sites for link building.

What is Domain Authority?

Domain Authority (DA) is a score, generally from 1 to 100, that estimates how likely a website is to rank in search results. It is based largely on a site's backlink profile — the number and quality of other sites linking to it. A higher DA suggests a stronger, more trusted site. DA is a third-party metric, not used by Google directly, but it is a popular way to compare the relative strength of websites.

How Does the Domain Authority Checker Work?

You enter a website's domain, and the tool looks up and reports its domain authority score, often alongside related metrics. You can check your own site or any competitor to compare relative authority.

What is a Good Domain Authority Score?

DA is relative, so "good" depends on your niche and competitors. As a rough guide, scores under 20 are common for newer sites, 20–40 is moderate, 40–60 is strong, and 60+ is high authority. The most useful approach is to compare your DA against the sites you actually compete with, rather than chasing a universal number.

Features of SEO Tools System's Domain Authority Checker

Instant DA Score — Get a domain's authority score in seconds.

Compare Competitors — Check rival sites to benchmark your own.

Evaluate Link Targets — Assess sites before pursuing backlinks.

Simple Input — Just enter a domain and check.

Free to Use — No signup required.

Who Uses a Domain Authority Checker?

SEO specialists benchmark authority and track progress. Link builders evaluate sites before requesting or buying links. Marketers compare their site against competitors. Website owners gauge their overall SEO strength. Anyone working on off-page SEO uses DA as a quick comparison metric.

How to Check Domain Authority using SEO Tools System?

• Open the Domain Authority Checker on SEO Tools System.
• Enter the domain you want to check.
• Run the check to retrieve the DA score.
• Review the score and any related metrics.
• Compare it against your competitors' domains.
• Use the insight to guide your link-building and SEO strategy.

Domain Authority Checker FAQs

Is Domain Authority used by Google?

No. DA is a third-party metric created to estimate ranking potential. Google does not use it directly, but it is a widely used way to compare the relative strength of websites.

How can I increase my Domain Authority?

Earn quality backlinks from relevant, trusted sites, publish strong content, and improve your overall SEO. DA tends to rise as your backlink profile and authority grow over time.

What is the difference between DA and MozRank?

Both estimate authority. DA scores a whole domain's ranking potential, while MozRank focuses on link popularity. You can also check a page with our MozRank Checker.

Is the Domain Authority Checker free?

Yes. It is free to use with no account required.

Learn More About Domain Authority

Guides from SEO Tools System to help you understand and grow your authority:

• Website Authority Explained — how DA, DR and MozRank work and what Google actually uses.
• How to Increase Domain Authority — what genuinely moves DA, and what to avoid.
• Is Domain Authority a Ranking Factor? — the honest answer, and how to use DA correctly.
• What Is a Good Domain Authority Score? — how to judge your score against competitors.

Related Tools

Explore more free SEO tools from SEO Tools System:

• DR Checker — check the Ahrefs-style Domain Rating of any site.
• MozRank Checker — check a page's link popularity score.
• Domain Age Checker — find out how old a domain is.
• Keyword Position Checker — find where your site ranks.
• SEO Report — get an overview of your site's SEO health.
• Blacklist Check — see if a domain is blacklisted.
• SERP Checker — see the search results for a keyword.