Network
무료 온라인 Network. 브라우저에서 즉시 데이터를 처리합니다. 업로드 없음, 가입 없음, 완전히 비공개.
Local processingNetwork Tools
Network tools run on Cloudflare Pages Functions (edge) with RESTful versioned endpoints (/api/v1/network/*). All endpoints enforce rate limiting, input validation, timeouts, and SSRF protection (no arbitrary URL fetch).
IP Lookup
Find your public IP address (IPv4/IPv6) and geolocation.
DNS Lookup
Query DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA) for any domain.
WHOIS Lookup
Retrieve WHOIS registration info for a domain.
SSL Certificate Checker
Inspect a website's SSL/TLS certificate chain, expiry, and issuer.
HTTP Header Checker
View HTTP response headers including security headers (CSP, HSTS, X-Frame-Options).
URL Availability Checker
Check if a URL is reachable and measure response time.
Security measures
- Rate limiting: Per-IP token bucket to prevent abuse.
- SSRF protection: External fetch allowlist; private IP ranges blocked.
- Input validation: All domain/URL inputs validated and sanitized.
- Timeouts: 5s default per upstream request.
- CORS: Restricted to FreeOnlineTools origins.
Usage example
# IP lookup curl https://freeonlinetools.top/api/v1/network/ip # DNS lookup curl "https://freeonlinetools.top/api/v1/network/dns?domain=example.com&type=A" # SSL check curl "https://freeonlinetools.top/api/v1/network/ssl?domain=example.com"
Note: Network tools require the edge service layer. Browser-only tools (image, text, crypto, etc.) process data locally and never send requests to these endpoints.
How to Use
Enter your input above. The result updates automatically. Use the copy button to copy the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
이 Network은 무료인가요?
네, 완전히 무료입니다. 가입이 필요 없습니다.
이 도구는 내 데이터를 업로드하나요?
아니요. 모든 처리는 브라우저에서 로컬로 이루어집니다. 데이터는 기기를 떠나지 않습니다.