Network & Web
Inspect URLs, headers, user agents, and web addresses.
URL Parser
Split an absolute URL into its protocol, host, path, query, and fragment.
Query String Parser
Decode query parameters and preserve empty or repeated values.
User-Agent Parser
Identify common browser, operating system, engine, and device clues.
HTTP Status Lookup
Look up standard HTTP response codes in a compact offline reference.
MIME Type Lookup
Map common file extensions and internet media types in either direction.
HTTP Header Parser
Parse raw HTTP headers while preserving duplicate fields and reporting malformed lines.
CSP Parser
Break a Content Security Policy into directives and highlight common weaknesses.
IPv4 Address Converter
Convert IPv4 between dotted, integer, hexadecimal, and binary forms.
CIDR Calculator
Calculate IPv4 network, mask, broadcast, wildcard, and usable ranges.
Basic Auth Generator
Encode username:password as a UTF-8 Base64 Authorization header.
IPv4 Range to CIDR Expander
Convert an inclusive IPv4 start/end range into the smallest exact CIDR block set.
MAC Address OUI Lookup
Identify selected common vendors from MAC prefixes with a clearly limited offline reference.
IPv6 ULA Generator
Generate an RFC 4193 unique local IPv6 /64 subnet with a random 40-bit global ID.
Device & Browser Information
Inspect live screen, viewport, browser, language, platform, touch, and online details.