🛜 View Your IPs: Detects and displays your local IPs, sourcing from multiple IPv4 and IPv6 providers.
🔍 Search IP Information: Provides a tool for querying information about any IP address.
🕵️ IP Information: Presents detailed information for all IP addresses, including country, region, ASN, geographic location, and more.
🛰️ ASN History & Upstream Topology: View historical AS announcements for an IP prefix, and visualize the upstream paths from an ASN to the Tier 1 backbone networks.
🚦 Availability Check: Tests the accessibility of various websites, such as Google, GitHub, YouTube, ChatGPT, and others.
📡 Service Status: Shows the live availability of well-known services (Claude, OpenAI, GitHub, Cloudflare, and more) from their official status pages, with per-service status and recent incidents.
🚥 WebRTC Detection: Identifies the IP address used during WebRTC connections.
🛑 DNS Leak Test: Shows DNS endpoint data to evaluate the risk of DNS leaks when using VPNs or proxies.
🚀 Speed Test:Test your network speed with edge networks.
🚏 Proxy Rule Testing: Test the rule settings of proxy software to ensure their correctness.
⏱️ Global Latency Test: Performe lantency tests on servers located in different regions around the world.
🚉 MTR Test: Perform MTR tests on servers located in different regions around the world.
🔦 DNS Resolver: Performs DNS resolution of a domain name from multiple sources and obtains real-time resolution results that can be used for contamination determination.
🚧 Censorship Check: Check if a website is blocked in some countries.
📓 Whois Search: Perform whois information search for domain names or IP addresses
📀 MAC Lookup: Query information of a physical address
🖥️ Browser Fingerprints:Multiple ways to caculate your browser fingerprint
📋 Cybersecurity Checklist:A comprehensive cybersecurity checklist with a total of 258 items
Contributions are welcome! We keep a curated set of beginner-friendly tasks — each with exact file paths, acceptance criteria, and tests that guide you to a green build:
🏷️ Good first issues — add a DNS resolver from your country, add curated site lists, translate the README into your language, polish translations, and more
🌐 TRANSLATING.md — bring the UI to your language: a locale pack plus one registry line, and a partial translation is a welcome first PR
📄 CONTRIBUTING.md — setup, conventions, and how PRs flow (target the dev branch)
MaxMind GeoLite2 (required) — free credentials that power IP geolocation and ASN lookups. Without them, the MaxMind source returns 503. → MaxMind Setup
ALLOWED_DOMAINS (required on a real domain) — hostname allowlist for the backend API. Without it, every request from a non-localhost domain gets 403. → Reverse Proxy & Domains
Everything else — optional API keys, security & rate limiting, logging, Sentry, the curl API domains — is documented in the Environment Variables reference.
If you're using a proxy for internet access, consider adding this rule to your proxy configuration (modify it according to your client). This setup lets you check both your real IP and the IP when using the proxy: