Network
Free online network tool collection, providing various network detection tools such as IP address query, port scanning, Ping latency test, DNS resolution query, network speed test, domain WHOIS query, subnet calculation, MAC address query, etc., which can be used directly in the browser without installing software, helping network administrators quickly troubleshoot network problems.
WiFi Channels
Wi-Fi Channel Frequency Table
Center frequencies, bandwidths and channel-selection tips for 2.4 GHz and 5 GHz Wi-Fi.
VLSM
VLSM Subnet Calculator
Enter a base network and host requirements to compute a VLSM subnetting plan.
URL Builder
URL Builder
Enter a base URL and key-value params to assemble a fully encoded request URL.
Transfer
Transfer Time Calculator
Estimate transfer time from file size and bandwidth, or reverse-solve bandwidth or size.
Supernet
Supernet Route Aggregation
Enter several CIDR networks to compute the longest common prefix and aggregate them.
Proxy
Proxy URL Parser
Parse a proxy URL into scheme, credentials, host and port with IPv6 support and reconstruction.
Ports
Common Ports Lookup
Built-in table of 40+ common TCP/UDP ports, searchable by service name or port number.
Subnet Mask
Subnet Mask Converter
Auto-convert between CIDR prefix, dotted mask, wildcard mask and host count.
MAC Gen
MAC Address Generator
Batch-generate random MAC addresses with correct unicast/local bits and OUI prefixes.
MAC Format
MAC Address Formatter
Convert between colon, hyphen, Cisco dotted and bare MAC notations in one click.
IPv6
IPv6 Address Tool
Validate IPv6, expand :: zero compression and recompress per RFC 5952.
IP Convert
IP Base Converter
Convert between dotted-quad, 32-bit integer, hex and binary IP notations.
IP Calc
IP Subnet Calculator
Enter an IP and prefix to instantly get network, broadcast, host range and host count.
Headers
HTTP Request Header Builder
Tick common request headers, edit values, and export a Name: Value header list.
cURL
curl Command Builder
Assemble method, URL, headers and body into a runnable curl command with correct quoting.
Cookies
Cookie Parser
Split a Cookie header string into a name/value/type table and strip outer quotes.
Basic Auth
HTTP Basic Auth Generator
Generate a Base64 Authorization header from username and password, with a curl example.