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Perimeter

Perimeter

Check your site's TLS, headers, DNS and accessibility

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Most website problems stay invisible until they cost you: a certificate quietly expires because auto-renewal broke, a deploy drops a security header, a redesign ships images with no alt text. Perimeter checks four things in one scan and grades them — TLS certificate, security headers, DNS/email auth (SPF/DMARC), and WCAG accessibility. Free, no signup. Paid plans re-check daily, alert you when something breaks, and show how to fix each finding. Compliance adds a dated, auditor-ready report.

Perimeter makers

Here are the founders, developers, designers and product people who worked on Perimeter

Ahsan@aac920
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