Page Authority Checker

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.

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. 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.

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 with 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.

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.

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 content correctly.

Being listed on spam or malware blacklists destroys domain reputation. Email servers reject mail from blacklisted domains. Search engines may de-index blacklisted sites. A single spam campaign or malware infection can result in blacklisting that takes months to remediate through each blocklist's removal process. Regular blacklist checks are a critical part of domain health monitoring.