JB Tool - Port Tester

Check whether TCP ports on a domain or IP address accept connections directly from your device.

Enter the target and ports you want to test:
• Use a domain, IP address, or URL
• Check one port, a comma-separated list, or a range
• Test up to 100 ports at once
• Select common ports for SSH, HTTP, HTTPS, RDP, and HTTP Alt

Understand each result at a glance:
• See open, closed, timed out, filtered, and unreachable results
• Follow progress while multiple ports are checked
• Review the elapsed time for each connection attempt

Save targets you use often as favorites. Completed and stopped tests remain in local History, where you can restore a target or delete individual entries. You can also share completed results through another app.

Local-network access is requested only when needed to test a private or local address. No account is required. The app contains no advertising, analytics, or tracking. Test targets, favorites, and History are not sent to JB FACTORY.