BrowserLeaks alternative — for the IP side of the picture
BrowserLeaks is an excellent set of browser fingerprint and leak tests: WebRTC, DNS, Canvas / WebGL fingerprint, fonts, timezone, and more — focused on what your browser exposes. For anti-fingerprinting and privacy hardening it's great.
But its focus is the browser fingerprint, not IP reputation. When your question becomes "is this IP a datacenter/proxy, is it clean, is it native, is its range bad," you need a dedicated tool for the IP side.
IPOK (ipok.io) is the no-signup, free alternative that covers that IP side: it aggregates 8 risk sources (ip-api, ipapi.is, proxycheck, AbuseIPDB, Scamalytics, StopForumSpam, IPQS + the in-house IPOK-DB) into an explainable risk / purity verdict, classifies native vs datacenter, and profiles the /24 neighborhood; it also offers a WebRTC/DNS leak self-test — click-to-run, local, never sent back. The two pair well: BrowserLeaks for the browser fingerprint, IPOK for IP reputation.