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Free IP & network tools

Check your IP, test a port or find a working proxy. Choose a tool to get started.

All tools

12 free tools

IP & privacy

See what your connection and browser reveal.

IP & privacy check

Find your public IP and check for possible privacy leaks.

WebRTC leak test

Check whether your browser reveals another network address.

DNS leak test

See which DNS resolver connections are observed.

Browser fingerprint

See the browser properties websites can read.

TLS fingerprint

See JA3, JA4 and your browser's TLS handshake options.

TCP/IP fingerprint

Inspect your connection’s network stack signals.

Connectivity

Troubleshoot ports, IP versions and connection protocols.

Open port checker

Test whether a TCP port on your connection is reachable.

CGNAT check

Compare your router address to help explain port forwarding issues.

IPv6 connectivity test

Check your IPv4 and IPv6 connections separately.

HTTP/2 & HTTP/3 test

See the protocol used by your browser’s connection.

Proxy tools

Check a proxy before using it.

Proxy checker

Paste one proxy or a list to check connectivity and response time.

SOCKS5 UDP tester

Check whether a SOCKS5 proxy supports UDP relay.

Not sure which tool to use?

Start with your public IP to see the address websites receive. If a server or game cannot accept connections, try the port checker and CGNAT check. To validate a proxy address or list, use the proxy checker.

For a VPN privacy check, compare WebRTC, DNS and IPv6 results before and after connecting. Each tool explains its measurements and any limitations.