12 Free Network Tools
Practical tools for IP analysis, DNS lookup, browser privacy inspection, email headers, and network reference tasks. No registration or software installation is required.
IP Analysis
Get detailed information about IP addresses
IP Lookup
Get detailed information about any IP address including location, ISP, and more.
Reverse DNS
Find the hostname associated with an IP address.
WHOIS Lookup
Find IP ownership, registration details, and contact information.
IP Map
Visualize IP address locations on an interactive world map.
Privacy & Security
Test your privacy and detect potential security issues
VPN Check
Compare your visible IP before and after connecting, then review VPN, proxy, Tor, and hosting indicators.
Browser Fingerprint
Review browser and device attributes that can contribute to fingerprinting.
HTTP Headers
Review a safe selection of request headers received from your browser.
User Agent Detector
Mobile-optimized tool to check browser, device, and touch capabilities.
DNS & Domain Tools
Analyze DNS records and domain information
Network Utilities
Calculate subnets and check security status
Why Use Our Tools?
Practical browser and server-side utilities for everyday network testing and analysis.
Common Use Cases
Our tools help with various networking tasks, from troubleshooting connectivity issues to ensuring your privacy online.
VPN Testing
Compare the IP address exposed by your connection and review third-party VPN, proxy, Tor, and hosting indicators.
Network Troubleshooting
Inspect DNS records, reverse hostnames, network registration data, and address metadata.
Security Auditing
Inspect browser fingerprinting signals and the request headers your browser exposes.
DNS Analysis
Research domain DNS records and inspect mail-routing configuration returned by the resolver.
Network Planning
Calculate subnet ranges, plan IP address allocations, and understand network topology for IT infrastructure projects.
Research & Investigation
Review public IP registration records, inspect message-routing headers, and research domain ownership information.
Frequently Asked Questions
Common questions about our network tools and how to use them effectively.
Are these network tools free to use?
Yes. The tools in this directory are free to use without registration.
How accurate are the IP geolocation results?
IP geolocation is generally accurate to the city level for most IPs. However, accuracy can vary depending on the ISP and type of connection. Rural areas may show less precise results.
Can I use these tools for testing other people's IP addresses?
Public registration, DNS, and approximate IP metadata can be looked up for public addresses and domains. Browser privacy tools only inspect the browser currently using the page.
What should I do if I find security issues with these tools?
Treat lookup results as one source of context. Review the relevant browser, DNS, or network settings and consult your network administrator or provider when a result is unexpected.
Start Testing Your Network
All tools are free, require no registration, and work directly in your browser. Choose a category above to get started.