1. What Is My IP? How Do I Look Up a Network Address?

Covers IP address lookup and subnet math. Use My IP to instantly get your public egress IP, ISP and location; IP Location to pinpoint any IP's city and carrier; IP Calculator and Subnet Calculator to plan address ranges and subnetting; CIDR Converter to move between classless routing formats; IPv4 to IPv6 to map IPv4 addresses into IPv6 format; and MAC Lookup to validate physical address formats and vendor info. Great for checking your egress IP, debugging IP conflicts and planning subnets.

2. Is DNS Resolving? Is My SSL Certificate Expiring?

For website operations and domain management. DNS Lookup fetches a domain's A, AAAA, CNAME, MX and TXT records to quickly confirm whether resolution is working; WHOIS Lookup shows the registrar, registration date and expiry date; Domain ICP Lookup verifies a site's ICP filing number and registrant details; and SSL Checker reveals an HTTPS certificate's issuing authority, validity period and chain integrity so an expired certificate never takes your site offline. Ideal for site admins who check domains and certificates on a regular basis.

3. Is the Server Reachable? How Fast Is My Connection?

Multi-angle connectivity detection and performance testing. Ping Test runs ICMP latency checks and TCP port probes to judge whether a target host is reachable and how many milliseconds the latency is; Port Checker tests whether a specific port on any IP (such as 80/443/3306/22) is open to the outside; Port Lookup is a quick reference for common port numbers, protocol types and purposes; Speed Test measures the current network's download speed, upload speed and latency to gauge broadband quality; and HTTP Test simulates GET/POST requests to debug API responses. Great for troubleshooting network faults, verifying a server before launch and testing broadband speeds.

4. What Is My Browser Environment? How Do I Send HTTP Requests?

Developer debugging and browser-environment detection tools. Browser Fingerprint detects the current browser's UserAgent, Canvas fingerprint, WebGL info and screen resolution in one click, often used for anti-bot and risk analysis; HTTP Methods is a quick reference for the semantics and use cases of GET, POST, PUT, DELETE and PATCH; MIME Types maps Content-Type values to file extensions; and Auto Refresh reloads a page on a timer, ideal for monitoring dashboards and data walls.

Network Tools FAQ