Free tools for clearer technical decisions
4.CX is a webmaster and network utility platform designed to help website owners, developers and IT professionals inspect common technical configurations without creating an account.
Our focus is practical visibility: understand DNS records, check certificates, inspect IP details and review essential SEO signals through consistent, easy-to-read interfaces.
Our Mission
Make everyday website diagnostics approachable, transparent and useful to a global audience.
What We Provide
Free IP, DNS, SSL, HTTP and SEO utilities, alongside practical guides and explainers.
Privacy by Design
No public user registration. Diagnostic requests should be processed with appropriate safeguards, limits and retention controls.
Responsible Use
Tools are intended for legitimate diagnostics. Results may depend on third-party sources and should be independently verified when important.
How 4.CX Works
Browse the tool directory or use the homepage search.
Enter the appropriate IP address, domain or URL for the selected tool.
Read clear field descriptions, error states and practical next steps.
Explore & Learn
Browse Guides for detailed tutorials, visit our Blog for technical articles, or start with DNS Lookup.