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Test TCP port reachability, response time, and IP resolution quickly & securely.
Port Checker is a modern, fast, and secure network utility designed for network engineers, system administrators, developers, and tech enthusiasts. Easily verify whether any TCP port on a hostname or IP address is open, closed, or timing out. Key Features: • Instant TCP Port Testing: Check socket connectivity for any domain name or IPv4 address. • Built-in Common Presets: One-tap testing for standard ports including HTTP (80), HTTPS (443), SSH (22), FTP (21), DNS (53), SMTP (25), MySQL (3306), PostgreSQL (5432), RDP (3389), Redis (6379), MongoDB (27017), and Minecraft (25565). • Precise Latency & Timing: Measure exact socket response times in milliseconds (ms). • Detailed Network Diagnostics: View resolved IP addresses, canonical hostnames, and exact socket status messages. • Customizable Timeout: Adjust connection timeout values from 2 to 10 seconds. • Searchable History: Store check logs locally on your device to quickly re-test past connections. • Copy & Share: Export clean diagnostic reports to your clipboard or share them with team members. • Zero-Proxy Architecture: All socket checks connect directly from your device to the target host. No third-party proxy servers touch your network traffic. • Dark Mode First: Clean, high-contrast Material 3 interface designed for single-handed use. DISCLAIMER: Port Checker is intended solely for legitimate network diagnostics, troubleshooting, and system administration on networks and syste