Free Tools in This Category
Domain Authority Checker
Calculate predictive Domain Authority (DA 1-100) and Page Authority (PA) based on backlink volume and root domain diversity.
Bulk Domain Rating Checker
Analyze authority metrics for up to 50 URLs or domains simultaneously to evaluate backlink outreach opportunities.
Domain Age Checker
Determine the exact age of any domain name since its initial ICANN registration date to gauge historical trust.
Understanding Domain Authority: What the 1-100 Score Really Means
Originally formulated by Moz, Domain Authority (DA) is a comparative search engine ranking score that predicts how likely a website is to rank on Google SERPs. It is calculated on a 100-point logarithmic scale:
- Logarithmic Progression: Growing your DA from 10 to 20 is relatively easy. Growing from 70 to 80 requires exponentially more high-authority editorial backlinks from major news media, universities, or government domains.
- Comparative, Not Absolute: DA is not a Google ranking factor used by search algorithms directly; rather, it is a predictive proxy modeling how Google's PageRank algorithm treats link graphs.
- Root Referring Domains over Raw Link Count: 1,000 links from a single spammy website provide virtually zero authority. 50 editorial links from 50 distinct, high-trust unique domains will dramatically increase your DA score.
| Domain Authority Tier | Typical Website Profile | Ranking Competitiveness | Recommended SEO Strategy |
|---|---|---|---|
| DA 1 – 20 | Brand new blogs, local small businesses, emerging niche sites | Can only rank for ultra-low competition long-tail queries (KD < 20) | Build foundational directory citations, publish high-depth cluster content, gain initial niche mentions. |
| DA 21 – 40 | Established niche blogs, regional e-commerce stores, B2B startups | Competes effectively for moderate keywords (KD 20 – 45) | Digital PR outreach, original research data reports, guest contributor thought leadership. |
| DA 41 – 65 | Major industry authorities, established SaaS tools, regional news publications | Strong ranking velocity; fast indexing of new articles (KD 45 – 70) | Topical authority expansion, link reclamation, brand mention conversions. |
| DA 66 – 100 | Wikipedia, The New York Times, Forbes, Amazon, government portals (.gov/.edu) | Dominates head terms and high-volume commercial keywords nationwide | Enterprise content governance, brand protection, technical crawl budget optimization. |
Tool-by-Tool Guide to Domain Authority Tools
1. Domain Authority Checker: Rapid Competitor Benchmarking
The Domain Authority Checker analyzes any target website domain and returns:
- Domain Authority (DA) Score (1-100): Predictive ranking strength across the entire domain.
- Page Authority (PA) Score (1-100): Individual webpage strength based on page-specific inbound links.
- Referring Root Domains Count: Total unique external web properties linking to the site.
- Spam Score Indicator: Percentage of sites with similar backlink profiles that were penalized or banned by Google.
2. Bulk Domain Rating Checker: Efficient Link Building Outreach
When conducting broken backlink campaigns, guest post prospecting, or competitor backlink intersection audits, checking URLs one by one wastes hours. The Bulk Domain Rating Checker processes lists of prospective outreach targets simultaneously, letting you sort by authority and filter out spammy link networks.
3. Domain Age Checker: Historical Trust and the "Sandbox" Effect
Older domains that have maintained continuous clean registration and ethical publishing records often rank faster for new content than freshly registered domains. The Domain Age Checker queries authoritative WHOIS registries to extract exact registration dates, expiration timelines, and historical age milestones.