Network
URL, IDN, IPv4 integer, email syntax, user-agent, and MAC forms on this device.
Subnet Calculator
IPv4 network, mask, and hosts.
Parse URL
Split a URL into host, path, query, and more.
Punycode IDN
Punycode with label/ASCII flags.
IPv4 Integer
Convert IPv4 ↔ integer (decimal or hex).
Email Syntax Check
Validate email syntax; lengths and normalized form.
User-Agent Parse
Guess browser family, version, OS, and mobile.
MAC Normalize
Normalize a MAC address to colon, dash, Cisco, or bare.
URL Origin
Origin plus protocol and host.
IPv4 in CIDR
IPv4 in CIDR with network.
Private IPv4
RFC1918, loopback, or link-local flag.
Cookie Header
Split a Cookie header into name=value lines.
Content-Type Parse
Media type and optional charset.
IPv4 PTR Name
in-addr.arpa PTR plus reversed octets.
URL Path
URL path and segment count.
URL Fragment
URL fragment with and without #.
Resolve URL
Resolve URL with origin/host/path.
IPv4 Netmask
Dotted mask, wildcard, and prefix.
Set-Cookie Pair
Name and value from a Set-Cookie line.
Same Origin
Whether two http(s) URLs share an origin.
IPv4 Broadcast
Network and broadcast from CIDR.
CIDR Host Count
Total and usable hosts plus dotted mask.
Host Port Split
Split host:port; optional default port.
Strip URL Query
Strip query with origin/path.
Is Absolute URL
Check absolute URL; optional http(s)-only.
Mailto Parse
Extract email, subject, and body.
Is IPv4
Validate a dotted IPv4 address.
URL Hostname
Extract host and port.
IPv4 Network
Network address from CIDR.
Is IPv6
IPv6 validity plus normalized host.
URL Userinfo
Extract username and password from URL.
Is HTTP URL
Validate http(s) URLs.
URL Join Path
Join URL path with parts.
Root Domain
Registrable root, TLD, and label count.
IPv4 Host Range
First and last usable hosts.
Well-Known Port
Name a common TCP/UDP port.
URL Scheme
URL scheme and hostname.
Strip WWW
Host without www; shows if stripped.
Is Localhost
Detect localhost-like hosts.
IPv4 Class
Class A–E, first octet, private flag.
Query Key Count
Query param count with unique keys and host.
URL Port
Extract host and port.
Has Query
Has query flag with param count.
Path Segments
Split URL path into segments.
Is HTTPS URL
Validate https URLs.
Is HTTP or HTTPS
Validate http or https URLs.
URL Pathname
URL pathname with segment count.
URL Hash
URL hash with # form and length.
Is Data URL
Data URL check with MIME and length.
Host Is IPv4
Whether the host is dotted IPv4.
Default Port of Scheme
Default port for a URL scheme.
IPv4↔IPv6 Convert
Map between IPv4 and IPv4-mapped IPv6.
IPv6 Compress
Compress an expanded IPv6 address.
MAC Vendor Lookup
Batch MAC → vendor from a local OUI table.
China Mobile DNS Table
Search a static CMCC DNS snippet list.
WAF Detect
Needs remote probes — stopped this wave.
CDN Detect
Needs network probes — stopped this wave.
Wi-Fi QR Code
Make a scan-to-join QR from SSID and password.
Subdomain Lookup
Needs DNS/CT probes — stopped this wave.
WHOIS Lookup
Stopped — no fake download.