44 tools · 4 categories · one JSON contract
Every diagnostic, one keystroke away.
Domain, DNS, network, security, and developer utilities. Free to use, no signup required for the basics.
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24 domain8 network7 security5 developer
44 shown
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Domain
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Domain Scanner
All-in-one domain checker — WHOIS, DNS, SSL, email auth and security headers in one live scan
✓ FreeOpen tool
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Domain Lookup
Domain Lookup for Whois and RDAP Data
✓ FreeOpen tool
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DNS Query (All Records)
Full DNS lookup — query every record type (A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV, PTR, TLSA, DS) at once
✓ FreeOpen tool
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A Record Lookup
Look up IPv4 A records for any domain — see the IP address(es) it resolves to
✓ FreeOpen tool
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AAAA (IPv6) Record Lookup
Look up IPv6 AAAA records — the modern equivalent of A records for IPv6-enabled hosts
✓ FreeOpen tool
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MX Record Lookup
Look up MX (Mail Exchange) records — see which mail servers accept email for a domain
✓ FreeOpen tool
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TXT Record Lookup
Look up TXT records — SPF, DKIM, DMARC, domain verification tokens and misc text records
✓ FreeOpen tool
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CNAME Record Lookup
Look up CNAME (Canonical Name) records — see what a subdomain is aliased to
✓ FreeOpen tool
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SOA Record Lookup
Look up SOA (Start of Authority) records — the master record for a DNS zone
✓ FreeOpen tool
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CAA Record Lookup
Look up CAA records — the CA (Certificate Authority) allow-list for a domain
✓ FreeOpen tool
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SRV Record Lookup
Look up SRV (Service) records — the port/host location for a service (SIP, XMPP, Microsoft Teams, Autodiscover)
✓ FreeOpen tool
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PTR / Reverse DNS Lookup
Reverse DNS — find the hostname assigned to an IP address (PTR records)
✓ FreeOpen tool
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TLSA (DANE) Record Lookup
Look up TLSA records — DANE certificate bindings for pinning your TLS cert in DNS
✓ FreeOpen tool
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DS Record (DNSSEC) Lookup
Look up DS (Delegation Signer) records — the DNSSEC trust link from parent to child zone
✓ FreeOpen tool
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DNS Propagation
DNS Record Propagation for domain
✓ FreeOpen tool
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Domain Trust Score
Composite trust score for any domain
✓ FreeOpen tool
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Name Server Lookup
DNS Nameservers Lookup for domain
✓ FreeOpen tool
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Domain Age Checker
How old is a domain? Age, key dates, and Wayback history
✓ FreeOpen tool
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Domain Expiry Checker
When does a domain expire? Countdown, renewal urgency, and calendar reminder
✓ FreeOpen tool
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Domain Snapshot
Domain Snapshots for mobile and desktop
✓ FreeOpen tool
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SPF Record Checker
Live SPF validator with 10-lookup counter, provider fingerprint, and a client-side sender-IP simulator
✓ FreeOpen tool
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Domain DMARC Lookup
Domain DMARC Records Lookup for domain
✓ FreeOpen tool
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Domain DKIM Lookup
Multi-selector DKIM scan with provider detection, key grade + AI diagnosis
✓ FreeOpen tool
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AI Readiness Check
AI Readiness Checker for domains
✓ FreeOpen tool
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Network
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MY IP Lookup
Lookup for My IP Data
✓ FreeOpen tool
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Ping Tool
Lookup for IP Ping Data
✓ FreeOpen tool
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IP Lookup
Lookup for Given IP Data
✓ FreeOpen tool
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Reverse IP Lookup
Lookup for Reverse IP Data
✓ FreeOpen tool
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Open Port Lookup
Lookup for Open Port Data
✓ FreeOpen tool
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IP Traceroute Data
Lookup for Traceroute Data
✓ FreeOpen tool
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Subnet Calculator
Subnet Calculator, Designer & CIDR Reference
✓ FreeOpen tool
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IP Blacklist Checker
Lookup for IP Blacklist Data
✓ FreeOpen tool
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Security
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SSL Certificate Checker
Deep SSL/TLS certificate analyzer — grade, chain, protocols, HSTS, CAA, and AI diagnosis in one scan.
✓ FreeOpen tool
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Phishing URL Checker
Is this link safe? Instant phishing verdict with AI
✓ FreeOpen tool
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MAC Address Lookup
Lookup for MAC Address Data
✓ FreeOpen tool
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Domain Security Header Lookup
Lookup for Domain Security Header Data
✓ FreeOpen tool
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Email Authentication Checker
Deliverability score + full SPF/DKIM/DMARC audit with BIMI, MTA-STS and TLS-RPT
✓ FreeOpen tool
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Email Header Analyzer
Paste raw email headers — auth verdicts, hop timeline and alignment in one view
✓ FreeOpen tool
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Subdomain Finder
Discover subdomains via Certificate Transparency logs and DNS brute-force with liveness enrichment
✓ FreeOpen tool
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Developer
5◊NEW
JWT Token Generator
Generate JWT Token as per Desired Configuration
✓ FreeOpen tool
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Token Decoder
Universal token decoder: JWT, Bearer, K8s, Basic, PASETO
✓ FreeOpen tool
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Hash Generator
Generate, verify & password-hash
✓ FreeOpen tool
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UUID Generator
Generate UUID
✓ FreeOpen tool
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Base64 Converter
Generate Base64 Encode Decode
✓ FreeOpen tool
FOR DEVELOPERS
Every tool, callable from any language.
Same JSON shape on every endpoint. No SDK lock-in. Free tier of 100 calls / month — upgrade only when production calls.