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Worldwide Accessibility
Available in 23 languages with servers around the globe for accurate detection.
NAT Checker
About NAT Checker
Your trusted tool for understanding and optimizing network connectivity
Check NAT Type Now
No registration required. No premium features. Completely free for everyone.
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Our Mission
NAT Checker was created to help gamers and network users understand their network configuration. We believe everyone should have access to free, easy-to-use tools for diagnosing and improving their online connectivity.
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23Why Choose NAT Checker?
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Privacy First
No account, no sign-up, no tracking profile. Request logs are kept for 7 days for reliability, then deleted.
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Fast & Accurate
Using WebRTC technology for instant, reliable NAT type detection.
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Free Forever
No registration required. No premium features. Completely free for everyone.
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Our Technology
NAT Checker uses WebRTC (Web Real-Time Communication) technology combined with STUN servers to accurately detect your NAT type. This browser-based approach means no software installation is required.
We also check your IPv6 connectivity to help you understand your complete network configuration and future-proof your gaming setup.
WebRTC
Browser API
STUN
Network probe
IPv4/6
Dual stack
Who Runs This Site
NAT Checker is an independent project, built and maintained by one developer rather than a company. You can reach me on X or support the project on Ko-fi using the links below.