Domain Authority Estimator

DA (Moz) focuses on link profile quality. DR (Ahrefs Domain Rating) measures referring domain strength. Authority Score (SEMrush) combines backlinks, organic traffic, and spam factors. They are not interchangeable.

Yes, the Domain Authority Estimator is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The Domain Authority Estimator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Domain Authority Estimator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Domain Authority Estimator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Domain Authority Estimator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

It is not a substitute for real Moz Domain Authority, and it does not try to be. Moz DA is built from a machine-learning model trained on billions of crawled links and actual Google rankings, so it reflects the real backlink profile of a site. This estimator never crawls backlinks or measures traffic. Instead it scores transparent surface signals: whether the domain resolves via DNS, the quality of its top-level domain, its length, and spam-like patterns such as long digit runs or repeated hyphens. The output is a directional, educational read out of 100, not a measured metric. Use it to quickly filter obviously weak candidates when vetting many domains, then confirm the ones worth pursuing with the built-in Moz, Ahrefs, and SEMrush links for the official numbers.

Before grading anything else, the tool confirms the domain is actually live. It queries Cloudflare's public DNS-over-HTTPS endpoint to look for an A record, which is the network address that says the domain resolves to a real server. A domain that resolves earns a base score; one that does not resolve scores zero, because an unreachable or unregistered domain has no authority to estimate. This is the one part of the analysis that requires a real network call, so the domain you type is sent to Cloudflare's resolver as part of a standard DNS query, with no account and nothing stored. Everything after that, including the TLD grade, length scoring, and factor breakdown, is computed in your browser. Enter any domain to see whether it resolves and what its DNS-verified estimate looks like.

In this estimator, yes, because top-level domains are graded into three tiers. Established extensions like .com, .org, .net, .edu, .gov, .io, and .co are treated as High quality and add the most points. Country and niche extensions such as .info, .biz, .me, .us, .ca, .uk, .de, and .fr are graded Medium and add fewer. Everything else falls to Low and adds none. This mirrors a common real-world pattern: spam and throwaway sites cluster on cheap or unusual TLDs, so a short .com reads as stronger than a long hyphenated .biz. Keep in mind this is a heuristic signal, not a ranking rule. Plenty of authoritative sites use country or niche TLDs, and Google does not penalize them by extension. Enter your domain to see exactly which tier its TLD lands in.

Two patterns drag the estimate down here, both because they correlate with low-quality or throwaway domains. Long runs of digits, roughly four or more in a row, suggest auto-generated or disposable names rather than a brand someone built a reputation around. Repeated hyphens, such as two or more stacked together, signal the same thing and also hurt memorability. Excessive length works against you too: names of about eight characters or fewer score best, while names stretching past 25 characters earn little credit because they are harder to recall and type. None of these alone proves a site is bad, but together they paint a picture of a name that was registered cheaply rather than nurtured. Run your domain through the estimator to see each of these flagged in the factor breakdown with a positive, neutral, or negative marker.

It is a useful first pass, but not a final verdict. When you are sifting a long shortlist of expired or auction domains, pulling a paid metric for every candidate burns credits and time. A fast, free heuristic helps you discard the obviously weak ones, names with poor TLDs, awkward length, or spammy digit and hyphen patterns, before you spend money on deeper checks. What it cannot tell you is the part that matters most for an expired domain: the backlink history, whether those links are toxic, and whether the name was ever penalized. Those require link-based tools. So treat a high estimate as permission to investigate further, never as proof of value. For any purchase carrying real budget, confirm the survivors with the Moz, Ahrefs, and SEMrush links the tool provides before you bid.