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Test tools
One question per page. Each runs only the probes it needs and shows the evidence behind the answer.
- WebRTC leak test Does WebRTC expose an IP address other than the one your HTTP requests use? A proxy that does not cover WebRTC leaks the real one to every site.
- DNS leak test Which resolver actually answers your DNS queries, and is it in the same network as your exit address? A resolver elsewhere means DNS bypasses the proxy.
- IP address, geolocation and reputation Your public IP, its country and ASN, reverse DNS, and how several IP-intelligence providers classify it — datacenter, VPN, proxy, Tor, or a plain residential line.
- TLS, HTTP/2 and TCP fingerprint The JA3 / JA4 fingerprint of your TLS ClientHello, the HTTP/2 SETTINGS and header order, the TCP SYN (JA4T) and the round trips — and whether all of them match the browser and OS your User-Agent claims.
- Canvas and audio fingerprint What your browser draws and sounds like: the Canvas and audio hashes, whether they stay stable between renders, and whether noise is injected into one readout path only — a pattern anti-fraud scripts detect.
- WebGL report Your GPU as WebGL reports it, the driver limits behind the renderer string, and whether the renderer matches the operating system your browser claims.
- Installed fonts Which fonts your browser exposes, and whether the set matches the operating system your User-Agent claims. Fonts come from the OS, not the browser.
- HTTP request headers The headers your browser sends, their order, and whether the Accept, Accept-Encoding and header order match the engine your User-Agent claims.
- Automation & headless detection WebDriver flags, driver traces, attached DevTools clients, patched built-ins and other signals that reveal a browser is automated or headless.
- Timezone & locale Your timezone, whether the Date offset agrees with it across historical dates, and whether it matches your IP country. A spoofed zone breaks on DST history.