Free Online Developer Tools

An all-in-one sandbox suite of essential network, server security configuration, and micro-utility engines.

💡 Need Dedicated API Access or Production Infrastructure?

Our tools are 100% free for ad-hoc browser testing. For high-volume automated business logic, we build custom dedicated features, private microservices, and specialized corporate workflow integrations.

Request Enterprise Custom Feature

South Africa SMS Tester

Send free test SMS payloads to South African numbers (Vodacom, MTN, Telkom, Cell C) to verify live gateway deliverability (5 per 24 hrs).

Secure Link Shortener

Dynamic URL link shrinking engine featuring built-in web filtering data lookups for robust user security threat assessments.

WHOIS Domain & IP Lookup

Query and parse globally distributed registration records for instant evaluation of network ownership metrics and registrar endpoints.

South African Company WHOIS

Lookup enterprise registry structural information directly mapped for verified businesses operating within South Africa.

Website SSL Checker

Inspect, validate, and verify local certificate authorities, encryption keys, and expiration timelines across public spaces.

Open Port Scanner

Audit exposed service ports on host target addresses to diagnose system protocol handshakes and security firewall rules.

What is My IP Address

Instantly determine your external network IPv4/IPv6 client details and extract geographical ISP routing information.

HTTP Headers Checker

Analyze raw HTTP response payloads, secure cookie status parameters, caching policies, and engine web server metadata configurations.

About Our Developer Utilities

Xii Group Technologies provides a free, lightweight suite of cloud-based web developer tools engineered to help systems administrators, web developers, cybersecurity analysts, and network managers diagnose infrastructural issues instantly.

Security & Network Auditing

Verify website security compliance by validating SSL/TLS certificate chains, auditing active response headers, or scanning public IP addresses for exposed ports to prevent server vulnerabilities.

Domain & Telemetry Tools

Perform WHOIS domain ownership lookups, test South African SMS delivery gateways, and trace client IP routing profiles using high-speed distributed network probes optimized for fast diagnostic feedback.