Site Health Kit – DNS Checker

Inspect domain DNS records, monitor global propagation, and diagnose website network health instantly from Chrome.

Site Health Kit DNS Checker provides website owners, developers, and network administrators with instant visibility into domain resolution and website network health directly from the browser. Inspect host routing, verify global propagation after domain migrations, and review domain security settings without leaving your active webpage. ━━━━━━━━━━━━━━━━━━━━━ 🌟 KEY FEATURES & CAPABILITIES ━━━━━━━━━━━━━━━━━━━━━ ⚡ Instant Active Tab Auto-Sync Automatically detects the domain of your active webpage when opened and updates dynamically as you browse. Use the built-in Lock toggle to pin and inspect any specific domain while comparing records. 📋 Comprehensive Domain Record Explorer Inspect standard domain configurations with complete TTL (Time to Live) values, priority indicators, and raw record data: • Host addresses and IPv6 routing • Canonical name mappings and alias pointers • Mail exchange configurations with priority levels • Authoritative nameserver delegation • Zone authority parameters and refresh intervals • Certificate authority authorization policies • One-click standard zone file export for backups and domain migrations 🌍 Global Propagation Testing Query multiple independent, geographically distributed public resolvers worldwide simultaneously. Compare consensus rates and verify that your latest domain updates have propagated across international regions. 🛡️ Email & Domain Security Audit Evaluate core domain protection mechanisms and identify misconfigurations before they cause deliverability or spoofing issues: • Email authentication mechanism and qualifier analysis • Domain policy enforcement verification • Cryptographic DNS signature status validation • Instant security rating with clear, actionable recommendations 🌐 Server Geolocation & Network Intelligence Quickly identify where websites are physically hosted: • Server public IP address and physical location (city, region, country) • Network route identifier and hosting organization • Resolution latency measurement 💻 Quick Tools Hub & Client Diagnostics Check your own local public network address and open deep diagnostic tools with pre-populated parameters for advanced performance, SSL, and redirect auditing. ━━━━━━━━━━━━━━━━━━━━━ 🔒 PRIVACY & PERMISSIONS ━━━━━━━━━━━━━━━━━━━━━ Site Health Kit is built with strict privacy-by-design principles: • Network queries are executed on-demand only when you open the tool. • We do NOT collect, store, or sell your browsing history, personal data, or session cookies. • Permissions used (activeTab, storage, sidePanel, contextMenus) are strictly required for opening the tool alongside your current tab and saving your interface preferences. Official Website: https://sitehealthkit.com Privacy Policy: https://sitehealthkit.com/privacy Support & Feedback: https://sitehealthkit.com/contact