Free tools for the web.

Fast, private and easy to use utilities for developers, sysadmins and curious people.

Domain WHOIS Domain registration info
Domain Availability Checker Check if a domain name is available
Domain Age Checker Check how old a domain is
Domain Expiration Checker Check when a domain expires
DNS Lookup Lookup DNS records
IP Lookup Find IP address details
ASN Lookup Look up ASN ownership
Port Scanner Scan open ports
DNS Propagation Checker Check DNS propagation
DMARC Checker Check your DMARC record
SPF Checker Check your SPF record
DKIM Checker Check your DKIM record
SSL Checker Check SSL certificate
SSL Analyzer Full SSL/TLS analysis
JSON Formatter & Validator Format, validate, and minify JSON
Base64 Encoder & Decoder Encode or decode Base64 & images
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Domain 4 tools
Network 5 tools
Security 5 tools
Developer 2 tools