BrowserLeaks is a free suite of individual fingerprint and leak tests — not one score, but a dozen separate checks (IP/DNS leaks, WebRTC, canvas, WebGL, fonts, audio, TLS/JA3). Reading it well means checking each section for internal consistency, not just "green vs red."
Most antidetect browser marketing screenshots a single BrowserLeaks page and calls it proof. That's misleading — BrowserLeaks isn't a pass/fail score, it's a diagnostic panel with a dozen independent sections, each testing a different layer of your fingerprint.
Confirms your visible IP matches your proxy/VPN exit node, and that DNS requests aren't leaking through your real ISP. A mismatch here undoes everything else — it's the single most common reason a "clean" profile still gets flagged.
WebRTC can expose your real local and public IP even behind a proxy, through STUN requests that bypass normal proxy routing. Any antidetect browser worth using patches this by default.
Shows the exact hash your browser produces when asked to render a hidden image or 3D scene. What matters isn't hiding this — it's whether the hash is internally plausible for the claimed device.
Lists every font BrowserLeaks can detect via enumeration. An unusually short or unusually long list compared to a real device of the claimed OS is itself a signal.
Checks the network-layer handshake fingerprint, independent of anything JavaScript can see. This is the layer most antidetect tools historically ignored, and where a lot of detection now happens.
Tools in this category — Nativ Browser, GoLogin, AdsPower, Dolphin Anty — each patch these layers to different depths. Nativ Browser's approach leans on a standalone local mode plus consistent parameter generation per profile, which is specifically meant to avoid the "clean canvas, contradictory WebGL" mismatch that's the most common BrowserLeaks failure.
For the other two major public checkers, see our Pixelscan vs Iphey comparison, and for the full testing methodology this site uses, see how we score fingerprint consistency.