Network Tools
Network trouble? Look up your public IP, ping a host, scan ports, query WHOIS, verify SSL certificates, test WebSocket connections — diagnose without touching the command line.
Network Tools · 11 tools
What Is My IP
Instantly see your public IP address with geographic details such as country, city and carrier.
Port Checker
Check whether ports on an IP or domain are reachable, in batches, with response times. Probing is performed by…
DNS Lookup
Query A, AAAA, MX, TXT, NS, CNAME and SOA records for a domain using our server-side resolver.
Ping Test
Measure connectivity and latency to a host with configurable probe counts, packet loss and min/avg/max statist…
SSL Certificate Checker
Inspect TLS certificate validity, expiry, chain details and hostname matching to diagnose HTTPS misconfigurati…
WHOIS Lookup
Query domain registration data, expiry dates, name servers and registrar information for suffixes worldwide.
IP Subnet Calculator
Compute network address, broadcast address, netmask, wildcard mask, host range and CIDR for IPv4 and IPv6 subn…
Short Link Expander
Expand short URLs and follow every redirect hop with status codes and timings. Works with t.cn, bit.ly and oth…
WebSocket Tester
Open a WebSocket connection, send and receive messages with JSON pretty-printing, and debug interfaces live.
LAN File Transfer
Transfer files and text between devices on the same network via direct WebRTC peer connection — no server in t…
Bilibili Cover Extractor
Pull the original cover art from any Bilibili video — BV id, av id, bangumi ep/ss id, video URL or b23.tv shor…
Network tools diagnose addresses, domains and connectivity: public IP, LAN transfer, port checks, WHOIS, SSL certificates, ping and WebSocket. These tools issue network requests from the server.