Free reputation and blacklist aggregator — quickly check whether an IP appears on multiple blacklists or is linked to malware.

Free account available — the “search engine for the Internet of Things” that finds devices and exposed services by IP.

Free abuse reporting and reputation lookup service — check whether an IP has been reported for malicious activity.

Free tier available — developer-friendly IP geolocation API with currency, timezone and security fields.

Free tier available — a comprehensive IP data API delivering geolocation, ASN, carrier, company and privacy flags.

Automated fingerprint comparison across browsers — privacy benchmark.

Enterprise-grade device identification API with 99.5% accuracy.

Free open-source fingerprinting analysis showing exact fingerprint entropy.

Comprehensive fingerprint scanner for IP, WebRTC, Canvas, and fonts.

Free research project showing how unique your browser fingerprint is.