Network Tools — 15 Free Online Tools
15 free online network tools. No signup required.
Network diagnostics and lookup tools. Check DNS, WHOIS, SSL, IP, email, package tracking, proxy detection, and internet speed. All in your browser.
CORS Header Generator - Access-Control-Allow-Origin Headers
Free CORS header generator. Configure allowed origins, methods, headers, credentials. Generate Nginx, Apache, Express, Flask, Cloudflare Workers snippets. Preflight simulation. AI gets CORS wrong - we don't.
DNS & WHOIS Lookup - Check Domain Records
Free DNS lookup and WHOIS checker. Query DNS records (A, AAAA, MX, NS, SOA, TXT) and domain registration info instantly. No signup required.
Domain Age Checker - Free WHOIS Domain Age Lookup
Free domain age checker. Check how old any domain is with instant WHOIS lookup. See creation date, age in years/months/days, expiry date, registrar, and nameservers. No signup. AI cannot check real WHOIS records - we do.
Email Authentication Checker - SPF DKIM DMARC Check
Free email authentication checker. Check SPF, DKIM, and DMARC records for any domain. Fix email deliverability. AI cannot check real DNS records - we do.
Email Verifier - Verify Email Addresses Instantly
Free email verifier. Check if email addresses are valid and can receive messages. Detect disposable emails and SMTP issues. No signup required.
Free Package Tracker - Track Any Carrier
Free universal package tracker. Enter any tracking number and automatically detect the carrier. Track USPS, UPS, FedEx, DHL, Amazon, and more. No signup.
Free Speed Test - Internet Speed Checker
Free internet speed test. Check your download speed, upload speed, and latency instantly in your browser. No software install needed.
HTTP Status & Header Checker - Response Code Security Audit
Free HTTP status checker. Check response codes, security headers, redirect chain, response time. AI cannot check real HTTP headers - we do.
IP Address Lookup - Find Your IP Address
Free IP address lookup tool. Find your public IP, location, ISP, and geolocation data instantly. No signup required.
Is It Down? - Website Down Checker
Free website down checker. Check if any site is down for everyone or just you. Real-time HTTP status, response time. No signup. AI cannot check real-time website status - we do.
Proxy Checker - Free IP Proxy Detection Tool
Free online proxy checker. Detect if an IP address is a proxy, VPN, or Tor exit node. Check IP geolocation, WHOIS, and open proxy ports.
SSL Certificate Checker - Test Website Security
Free SSL checker. Scan any website for TLS security and certificate validity. Get grade A+ to F. No signup. AI cannot test real SSL certificates.
Subnet Calculator - IPv4 IPv6 CIDR VLSM Supernetting
Free subnet calculator for IPv4 and IPv6. Bit-exact CIDR, VLSM, supernetting, overlap detection. No signup. AI cannot reliably compute subnets - we do.
URL Metadata Extractor - Link Preview & Meta Tag Analyzer
Free URL metadata extractor. Extract OG tags, Twitter cards, JSON-LD, and SEO meta from any URL. See link previews before sharing. No signup.
User Agent Parser - Browser OS Device Detection Online
Free online User Agent parser. Parse any UA string to identify browser, OS, device, and bot. Detect Googlebot, GPTBot. 100% private, no upload.