Network & IP tools
Calculate subnets and CIDR ranges, convert IP formats, parse URLs and query strings, inspect user agents and decode HTTP status codes and headers.
13 tools in this category
Subnet Calculator
Calculate network, broadcast, host range, and mask from an IPv4 CIDR.
CIDR Range Expander
Expand a CIDR block into individual addresses, or compress a range into CIDR blocks.
IP Converter
Convert IPv4 to decimal/hex/binary, and expand or compress IPv6.
URL Parser
Break a URL into protocol, host, port, path, query, and hash.
Query String Converter
Convert between URL query strings and JSON, with nested bracket support.
User Agent Parser
Parse a user-agent string into browser, engine, OS, and device type.
HTTP Status Codes
Searchable reference of HTTP status codes with meaning and usage guidance.
MAC Address Tools
Validate and reformat MAC addresses, and look up the OUI vendor prefix.
Port Number Lookup
Search well-known TCP/UDP ports and their services.
HTTP Headers Explainer
Look up common HTTP headers and explain pasted raw headers.
DNS Record Types Reference
Searchable reference of DNS record types with examples.
IPv6 Expander/Compressor
Expand an IPv6 address to full form or compress it to shorthand.
MIME Type Lookup
Search file extensions and their MIME types.