Networking Tools

Parse and validate IPv4/IPv6 addresses and CIDR ranges

Quick lookup of HTTP status codes and their meanings

Explain A, AAAA, CNAME, MX, TXT, SRV and other DNS records

Decode WebSocket frame headers and payloads from hex

Look up common services for any TCP/UDP port number

Convert between file extensions and MIME types

Decode X.509 PEM certificates into readable fields

Generate HTTP Public Key Pinning headers from a certificate

Parse browser, OS, device from a User-Agent string

Analyze CORS response headers for misconfigurations and security issues

Calculate network address, broadcast, host range from CIDR notation

Analyze HTTP headers for security, caching, and best practices

Identify the manufacturer from a MAC address OUI prefix

Quick reference for all HTTP methods with use cases and safety info