Tools
A small set of fast, free network tools. Each runs in your browser or reads only your own request — no tracking, no sign-up.
What is my user agent?
See your browser's User-Agent string and the browser, OS and device it reveals, plus live client details.
My HTTP headers
Inspect the exact HTTP request headers your browser sends, and copy them as plain text.
WebRTC leak test
Check whether your browser exposes your real IP via WebRTC — even behind a VPN.
Subnet calculator
Enter an IPv4 address and CIDR or mask to get the network, broadcast, host range and more.
IPv6 test
Find out whether your connection supports IPv6 by probing both protocols from your browser.
What is my location?
Your approximate location and ISP from your IP, plus optional precise browser geolocation.