Guides
Plain-English notes that match what the free scanner checks. Each guide links to its tool, and each tool links back here. Informational only — not a security audit or a guarantee.
- SPF, DKIM and DMARC explained — with the SPF, DKIM and DMARC checkers
- SSL and “Not secure” warnings — with the SSL and mixed content checkers
- Security headers that matter — with the security headers checker
- Redirects and broken links — with the redirect and broken link checkers
- How to speed up your website — with the speed test (Core Web Vitals: LCP, INP, CLS)
- Website accessibility and cookies — with the accessibility and cookie checkers
Looking for on-page search basics? Use the SEO checker. For the trust overview, see What we check.