Introducing NETWORKGEEKTOOLS.COM
Whether you’re a network engineer troubleshooting a routing issue at 2 AM, a sysadmin verifying DNS propagation after a migration, or a developer checking why your API endpoint isn’t reachable — you’ve probably juggled a dozen browser tabs with different online tools. In the last few months I was learning a bit of typescript and decided to build a few of my own common tools as online site NetworkGeekTools.com to put all of those essentials in one place: fast, free, no sign-up required.
Here’s a quick tour of every tool available today.
Contents of Article
📍 What’s My IP?
Open the page and your public IP address appears instantly — both IPv4 and IPv6. Alongside it you get geolocation (country, region, city), ISP and AS number, connection-type flags (mobile, proxy/VPN, hosting), and a direct link to view your location on Google Maps. Zero input required.
📈 Ping & Latency Tester
Measure TCP latency to any host with configurable rounds (1–10). You get min, max, and average latency, jitter, packet loss percentage, and per-round results displayed with visual latency bars. Preset buttons for hosts like Google, Cloudflare, and AWS make quick testing painless.
🔍 DNS Lookup
Query A, AAAA, MX, TXT, CNAME, NS, and SOA records for any domain. Results include TTL and priority values in a clean table. You can also query all record types at once for a complete picture of a domain’s DNS configuration.
🌐 Port Checker
Test up to 10 TCP ports simultaneously on any host. Each port is reported as open, closed, filtered, or timed-out, along with response time and the well-known service name from a built-in reference database.
📋 WHOIS Lookup
Look up domain registration data: registrar, creation/update/expiry dates with a handy countdown, nameservers, domain statuses, and DNSSEC info. The tool shows both neatly parsed fields and the raw WHOIS output so you can copy exactly what you need.
✅ Website Status Checker
Paste a URL to find out if a site is up or down. The tool checks HTTPS first, falls back to HTTP, and returns the HTTP status code, response time, content type, server header, and SSL certificate status with its expiry date. A history of your recent checks is kept locally for quick reference.
🛡️ SSL/TLS Certificate Checker
Analyze any domain’s SSL certificate in depth: validity status with a countdown to expiry, issuer and subject details, serial number, SHA-256 fingerprint, TLS version, cipher suite, full certificate chain, and all Subject Alternative Names. Color-coded warnings flag certificates nearing expiration.
🌍 IP Address Lookup
Get detailed geolocation and network data for any IPv4 or IPv6 address: country, region, city, coordinates, timezone, ISP, organization, AS number, reverse DNS, and connection type. Your own IP is loaded automatically on page load, and quick-lookup buttons let you inspect popular DNS services like Google (8.8.8.8) and Cloudflare (1.1.1.1) in one click.
⚡ Bandwidth Calculator
Three calculators in one. Estimate download time from file size and connection speed. Convert between bandwidth units (bps through Gbps, B/s through GB/s). Convert between data-size units (bytes through petabytes). Presets for common speeds and file sizes make quick estimates effortless.
🔢 IP Subnet Calculator
Enter an IP address and CIDR prefix and get the full breakdown: network and broadcast addresses, subnet mask in decimal and binary, wildcard mask, usable host range, total host count, IP class, and whether the network is public or private. Essential for any VLSM or addressing task.
📄 Network Config Generator
Generate ready-to-use configuration snippets for four platforms: iptables (allow, block, port forward, NAT), Nginx (reverse proxy, load balancer, SSL redirect, rate limiting), Apache (reverse proxy, SSL redirect, basic auth), and Cisco-style ACLs (standard and extended). Copy to clipboard or download as a file.
Try Network Config Generator →
🌳 IP Range Classifier
Enter any IPv4 or IPv6 address to instantly identify whether it belongs to a special-purpose range: private (RFC 1918), CGNAT (RFC 6598), loopback, link-local, multicast, reserved, documentation, tunnel, benchmarking, or broadcast. Each classification includes the RFC citation and routability status, plus a comprehensive quick-reference table.
Why NetworkGeekTools?
- All free, no sign-up. Every tool works instantly — no account required.
- Fast. Client-side calculations run locally; server-side lookups use optimized APIs with low-latency edge functions.
- Mobile-friendly. Responsive design so you can troubleshoot from your phone on the datacenter floor.
- Privacy-first. I don’t log your queries or sell your data.
Bookmark networkgeektools.com and keep it handy for your next troubleshooting session. I am actively adding more tools based on community feedback — if there’s something you’d like to see, let us know in comments below!
Potential future tools?
If this small project will have some success (e.g. someone will actually use it, my future plans include creating a monitoring tool where people can sign-up, enter their public IP/domain they want to check periodically for some status and the system would notify them if the target didn’t responded as expected and build some history.