Page Authority Checker
Analyze domain health signals including DNS, HTTPS, robots.txt, and sitemap presence.
What Is Domain Authority?
Domain Authority (DA) is a metric popularized by Moz that predicts how likely a website is to rank in search engine results. It is calculated on a logarithmic 1-100 scale based on linking root domains, total links, and other factors. High DA takes years to build and indicates a trustworthy, established domain. This tool provides technical signals — not Moz's proprietary score — but these signals strongly correlate with domain health.
Key Trust Signals
DNS resolution confirms the domain is active. HTTPS (SSL/TLS) is a Google ranking factor since 2014 and protects user data. A robots.txt file shows the site is professionally managed and allows search engine crawling control. A sitemap.xml helps search engines discover and index pages efficiently. Domain age matters because older domains typically have more established backlink profiles and reputation.
Domain Age and Reputation
Newly registered domains (under 6 months) are treated with suspicion by email filters, search engines, and security tools. Many phishing and malware domains are freshly registered. Conversely, aged domains that have maintained clean reputations are more trusted. Domain age alone does not guarantee trustworthiness — a domain can be old and compromised or sold to bad actors who leverage the inherited reputation.
SEO Metrics Explained
Page Authority (PA) measures the ranking strength of a specific page. Domain Authority (DA) measures the overall domain. Trust Flow (Majestic) measures link quality. Citation Flow measures link quantity. These metrics are vendor-specific and not used by Google directly, but they correlate with actual ranking performance because they indirectly measure what Google measures: the quality and quantity of inbound links.
Security Implications
Domains without HTTPS transmit data in plaintext, enabling man-in-the-middle attacks. Missing robots.txt may expose sensitive paths to search engine indexing. Old domains can be acquired by attackers specifically to inherit their reputation (domain aging abuse). Regular monitoring of your domain's technical health prevents reputation damage and ensures search engines continue indexing your content correctly.
Blacklists and Domain Authority
Being listed on spam or malware blacklists destroys domain reputation. Email servers reject mail from blacklisted domains. Search engines may de-index blacklisted sites. Regular blacklist checks are a critical part of domain health monitoring. A single spam campaign or malware infection can result in blacklisting that takes months to remediate through each respective blocklist's removal process.
Frequently Asked Questions
What is a good domain authority score?
Scores above 60 are generally considered strong. New sites typically score below 20. Focus on the relative change over time rather than the absolute number.
How do I improve my domain's authority?
Earn high-quality backlinks from authoritative sites, publish consistently useful content, fix technical issues (HTTPS, speed, mobile), and maintain a clean security reputation.
Why is my HTTPS check failing?
The domain may not redirect HTTP to HTTPS, the certificate may be expired, or the server may not respond to HTTPS requests. Check your SSL certificate validity with our SSL Checker tool.
How does domain age affect SEO?
Older domains typically have more established backlink profiles and trust signals. Google uses domain history as one of many ranking factors. New domains typically take 6-12 months to gain significant ranking traction.
What is robots.txt used for?
robots.txt tells search engine crawlers which pages or directories to avoid indexing. It does not block access — it is an advisory protocol that well-behaved bots follow.