Network

18 network tools in Web & API. Each one runs in this tab, so nothing you paste in leaves the machine.

All network tools

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HTTP Header Parser
Paste raw headers and get structured JSON with header count
MAC Address Lookup
Enter a MAC address and get the vendor/manufacturer, OUI prefix
IP Range Calculator
Enter CIDR, dash range, or start/end IPs and get total addresses
IP in CIDR Checker
Enter an IP address and a CIDR range to check if the IP falls within
MIME Type Lookup
Enter a file extension or MIME type string and get the matching
cURL Builder
Configure URL, method, headers, auth
Integer to IP
Enter a decimal, hex, or octal integer and get the dotted-decimal IP
Subnet Calculator
Enter CIDR notation or IP with subnet mask and get network address
Range to CIDR
Enter a start-end IP range and get the minimal set of CIDR blocks
IP to Integer
Enter a dotted-decimal IP address and get the decimal integer, hex
CIDR to Range
Enter CIDR notation and get the first IP, last IP, total addresses
IPv6 Compressor
Enter a full or partial IPv6 address and get the shortest compressed
IP Info Parser
Enter an IPv4 or IPv6 address and get version
CIDR Calculator
Enter CIDR notation and get network address, broadcast, subnet mask
HAR Analyzer
Paste HTTP Archive JSON and get request statistics
HTTP Status Reference
Get the meaning, category, and RFC spec for status code 429
IPv6 Expander
Enter a compressed IPv6 address and get the full 8-group notation
HTTP Headers Reference
Browse 40+ standard headers by category (request, response