Proxy-like timing
A repeated difference between WSS and TCP RTT can suggest an intermediary that splits TCP connections. It does not identify every proxy or VPN.
Free proxy checker.
Check latency, WebRTC IP exposure, HTTP/3 support, and IP details together in one report. Open this page in the browser or proxy profile you want to test.
HOW TO USE THIS CHECKER
How to use this tool
Open the browser or proxy profile you actually want to check. The full report combines independent measurements without turning missing data into a pass.
- 01
Open your browser or proxy profile
Use your current HTTP or SOCKS5 proxy configuration. You do not need to paste a proxy address or password.
- 02
Run the full connection check
Keep this tab visible while the latency, protocol, and network checks finish.
- 03
Compare the evidence
Expand individual rows, download the report, and repeat on a direct connection for context.
What each result means.
Address differences
Different web or WebRTC IPs may indicate an exposure, rotation, or split routing. Compare addresses of the same family before drawing a conclusion.
Protocol availability
HTTP/3 and WebRTC test different uses of UDP. A result from one does not establish whether every UDP protocol works.
PROXY CHECKER FAQ
Understand your results.
No single check proves whether a connection is direct. Read the signals together.
How do I check if my browser is using a proxy?
Open this free proxy checker in the browser or proxy profile you want to test, then select Run all checks. Review the WebSocket vs. TCP timing, observed IP addresses, WebRTC results, and HTTP/3 support together. A proxy-like result is a signal to investigate, not definitive proof.
How does the WebSocket vs. TCP latency test work?
The test opens three connections and sends five WebSocket pings on each. It compares the lowest WebSocket round-trip time with the server’s TCP baseline on that same connection. Repeated large gaps can suggest a proxy that splits TCP connections. Network conditions and browser delays can also affect the result.
Can this proxy detector identify every VPN or residential proxy?
No. Some VPNs and proxies show little timing difference, and a residential IP does not prove a direct connection. This tool reports measured signals, not a guaranteed VPN detection verdict. It does not currently use a proxy or VPN reputation database.
What does the WebRTC IP check reveal?
The WebRTC check uses STUN to look for a public UDP address and compares it with the addresses observed by the web tests. A different address may indicate an IP leak, a rotating proxy, or another route. No public candidate can also result from browser privacy settings; it is not proof that all UDP traffic is blocked.
Does a failed HTTP/3 or QUIC test mean UDP is blocked?
No. The HTTP/3 check only confirms whether this browser completed an HTTP/3 request over QUIC. A browser may use TCP because of its proxy configuration, settings, or network restrictions. HTTP/3 and WebRTC are separate checks.
Is the proxy checker free, and does it test DNS leaks?
The proxy checker is free and does not require an account or proxy password. This version does not test DNS leaks, IP reputation, or TCP/IP operating-system fingerprints. Unavailable measurements are displayed as unavailable, rather than counted as a pass.