Network Toolkit

Analyze domains, URLs, IP addresses, DNS records, SSL certificates, and email configuration from a single workspace.

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My IP AddressYour current public IP address as seen by the server

IP GeolocationIP address → country / city / ISP / coordinates

ASN LookupIP address → autonomous system number & organisation

IPv4 ValidatorCheck whether an IP address is valid IPv4 format

IPv6 ValidatorCheck whether an address is valid IPv6 format

IPv4 ↔ Integer ConverterConvert between dotted-decimal IPv4 and 32-bit unsigned integer

IPv4 Address → Integer

Integer → IPv4 Address

IP Type CheckerDetect private / public / reserved / class / loopback / multicast

CIDR CalculatorEnter CIDR notation to calculate network details

Subnet CalculatorIP address + prefix length → full subnet details

IP Range InfoEnter start and end IPs to get range size, CIDR list, broadcast

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CIDR → IP RangeExpand CIDR block to first / last IP and usable host count

Range → CIDR ListCompress an IP range into the minimum set of CIDR blocks

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Network / Broadcast / WildcardCalculate network address, broadcast address and wildcard mask

DNS LookupLook up any DNS record type for a domain

A RecordsIPv4 address records for a domain

AAAA RecordsIPv6 address records for a domain

MX RecordsMail exchange servers (priority ordered)

TXT RecordsText records (SPF, DKIM, verification...)

NS RecordsAuthoritative name servers for the domain

CNAME RecordsCanonical name aliases

SOA RecordsStart of authority (serial / TTL / admin)

SRV RecordsService location (SIP, XMPP, etc.)

SPF RecordsTXT records starting with v=spf1 — Sender Policy Framework

DKIM Record LookupLook up a DKIM public key for a domain and selector pair

DMARC RecordsTXT records at _dmarc.{domain} — Domain-based Message Authentication

Reverse DNS (PTR)IP address → hostname reverse DNS lookup

DNS Zone ViewerAll major DNS record types for a domain in one view

DNS Propagation CheckerCheck if your DNS changes have propagated across multiple global resolvers

DNS Record FormatterPaste raw DNS record output and get it formatted with explanations

Domain ParserParse a URL or domain into protocol / subdomain / SLD / TLD / path / port

Domain ExtractorExtract all domains and hostnames from a block of text

TLD ExtractorExtract the top-level domain (TLD) from any domain or URL

Subdomain ExtractorExtract just the subdomain portion from a full domain or URL

Domain → IPResolve a domain name to its IPv4 and IPv6 addresses

WHOIS / RDAP LookupDomain registration info via RDAP protocol (registrar / dates / nameservers)

Reverse IP LookupIP address → ISP / organisation / hosting provider / reverse DNS

Domain Age CheckerLook up the registration date and age of a domain via RDAP

Domain Expiry CheckerCheck when a domain expires and how many days remain via RDAP

Domain AvailabilityCheck if a domain name is available to register

URL ParserDissect a URL into all its components — protocol, host, path, query, fragment

URL EncoderPercent-encode special characters for safe use in URLs

URL DecoderDecode percent-encoded URI components back to plain text

URL Query BuilderBuild a URL query string from key-value pairs

Base URL (optional)

Parameters

URL Query ParserParse a URL or query string and list all key-value parameters

URL ExtractorFind and extract all URLs from a block of text

URL Slug GeneratorConvert any text into a clean, URL-friendly slug

URL Redirect CheckerCheck if a URL issues an HTTP redirect and where it goes

URL Opener TesterTest whether a URL is reachable and preview the final destination in a new tab

Canonical URL CheckerFind the <link rel="canonical"> tag declared by a web page

HTTP Status Code ReferenceComplete list of HTTP status codes with descriptions

HTTP Header ViewerFetch all response headers from any URL

Request ViewerSee your browser's request headers exactly as received by the server

User Agent ParserParse any User-Agent string to identify browser, OS, device and bot status

MIME Type LookupSearch MIME types by extension or type name

Cookie ParserParse a Set-Cookie header or cookie string into its fields

Security Header CheckerCheck which security headers (HSTS, CSP, X-Frame-Options…) are present

Cache HeadersInspect Cache-Control, ETag, Expires, Vary and CDN cache status

Redirect ChainFollow all HTTP redirects from a URL and show each hop

Website Response TimeMeasure response latency (3 pings, avg / min / max)

HTTP Status CheckFetch a URL and return its live HTTP status code and response time

Content-Type CheckerRetrieve the Content-Type, MIME type, charset and encoding from a URL

SSL Certificate CheckerFull SSL/TLS certificate details for any domain

SSL Expiry CheckerCheck SSL certificate expiry date and days remaining

SSL Chain ViewerView the full certificate chain for a domain

Certificate DecoderDecode all fields from an SSL certificate

CSR DecoderDecode a Certificate Signing Request (CSR) PEM to view subject, key type and bits

CSR GeneratorGenerate a new Certificate Signing Request (CSR) and private key

Common Name (CN) *
Organisation
Org Unit
City / Locality
State / Province
Country (2-letter)
Key Size

PEM Certificate DecoderPaste a PEM-encoded certificate to decode all its fields

Email Header AnalyzerPaste raw email headers to parse routing, delays & authentication

SPF CheckerLook up the SPF TXT record for a domain and parse its directives

DKIM CheckerLook up DKIM public key records by domain and selector

DMARC CheckerLook up DMARC policy at _dmarc.{domain} and parse directives

MX LookupGet mail exchange servers with priority and resolved IP addresses

Website Availability CheckerCheck if a website is reachable and responding

Server InformationDetect web server, framework, CDN provider and response time

HTTP Method TesterTest which HTTP methods (GET, POST, PUT, DELETE…) are accepted

Robots.txt ViewerFetch and display the robots.txt file from a domain

Sitemap CheckerFind and parse the XML sitemap for a domain

Security.txt CheckerCheck for a .well-known/security.txt file on a domain

Common Ports ReferenceWell-known TCP/UDP port numbers and their services

Port Number LookupLook up a specific port number or service name

Open Redirect CheckTest a URL for open redirect vulnerability — detects cross-domain redirects

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