Port Scanner – Check Open Ports & Services
Scan network ports, identify services, check security, and detect vulnerabilities with common and custom port ranges.
Port Scanner
Scan for open ports on hosts
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Scan common web server ports (80, 443, 8080) for HTTP/HTTPS services
Scan full port range to identify all open ports and potential vulnerabilities
Find all running services by scanning common service ports
Check specific port availability for connection debugging
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› About this tool · FAQ
Stop manually checking network ports! Scan ports to discover open services, detect potential security vulnerabilities, and analyze network security posture. Supports common ports, custom ranges, and service detection. Perfect for network security, penetration testing, and infrastructure audits. Free, works offline, unlimited scans.
How do I scan network ports?
Enter a hostname or IP address, select scan type (common ports, range, specific ports, or service-based), and click Scan. The tool simulates port scanning and shows open/closed status, service detection, and security analysis instantly.
Is this port scanner free?
Yes, completely free with unlimited port scans. No signup required, no watermarks. Simulate network port scanning for educational purposes instantly in your browser.
Are scan results uploaded to servers?
No, all port scanning simulation happens locally in your browser. Your network information and scan results never leave your computer for maximum privacy.
What types of port scans are supported?
The tool supports common ports (top 20), port ranges (e.g., 1-1000), specific ports (e.g., 80,443,8080), and service-based scans focusing on database and web services.
Why is this a simulated scan?
Web browsers cannot perform actual network port scanning due to security restrictions. This tool simulates realistic results for educational and demonstration purposes.
What do the port statuses mean?
Open: Service is listening and accepting connections. Closed: No service listening. Filtered: Port blocked by firewall. Timeout: No response within time limit.
How can I perform real port scanning?
Use dedicated tools like Nmap, Masscan, or Zmap from command line. Always ensure you have permission before scanning networks you don't own.
What services are commonly found on different ports?
Port 80 (HTTP), 443 (HTTPS), 22 (SSH), 21 (FTP), 25 (SMTP), 3306 (MySQL), 5432 (PostgreSQL), 3389 (RDP), and many others have standard service associations.