About

Online Network Troubleshooter is a collection of free, browser-based tools designed to help network engineers, system administrators, and security analysts quickly diagnose connectivity, performance, and security issues.

Upload packet captures, review detailed connection metrics, and identify common problems such as incomplete handshakes, retransmissions, resets, or suspicious activity toward sensitive services — all without installing desktop software.

Current Tools

• PCAP Analysis — Upload a Wireshark .pcap / .pcapng file and receive a structured report with connection health, anomaly scores, and possible root causes.
• Certificate Chain Checker — Enter a website and verify that its TLS certificate chain is ordered correctly (Leaf → Intermediate → Root).
• SSL/TLS Grade Summary — Check a host’s TLS configuration, certificate, protocols, cipher, HTTP/2 support, and receive a simple grade.
• HTTP Security Headers — Enter a URL and review HSTS, CSP, X-Frame-Options, and other security headers.

More tools will be added over time. Analysis is performed temporarily in memory; uploaded files are deleted immediately after processing.