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Free Online Tool For Open Ports

PortChecker is a fast, browser-based tool that checks whether a TCP port on an IP address or domain is reachable from the public internet. It’s ideal for developers, DevOps/IT teams, and home-lab users who need to verify firewall rules, cloud security groups, router port forwarding, or server exposure. Local tests can be misleading—services may be running but still blocked by NAT, ISP restrictions, wrong public IP/DNS, or OS firewalls. PortChecker provides an external, real-world connectivity check so you can quickly confirm if a port is open, closed, or unreachable and focus your troubleshooting on the right layer. No installs, no command line—just enter the host and port and get clear results in seconds.
RedLemon Inc.
2025
United States
  • Computer-network-security
1 Industry
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8 Languages
Industries
  • Computer-network-security
Licensing & Deployment
Support
  • Email
  • Weekdays
    Support Days
    • Monday
    • Tuesday
    • Wednesday
    • Thursday
    • Friday
    Support Time
    • 09:00 to 20:00 (GMT)
Training
  • Documentation

Port Chekcer Core Features

Focus of Productivity Feature
  • Reports & Analytics
Focus of Network Security Feature
  • Security Assessment

Port Chekcer Pricing

Pricing Type
  • Free
Preferred Currency
  • USD ($)
Vendor pricing page

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