Servers by mike-tusa

Free SSL/TLS certificate checker: expiry, chain trust, hostname match, TLS version, A/B/C/F grade.

Parse a User-Agent: browser, OS, device, plus bot, search crawler, AI crawler and AI agent flags.

Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes.

Scan a website's HTTP security headers (HSTS, CSP, framing, COOP/CORP, cookies). Score + fixes.

Domain age and RDAP lookup: registration date, age, expiry, registrar, status and nameservers.

Offline phone-number validation and formatting (E.164, region, line type). No carrier lookup.

English readability scores (Flesch, Flesch-Kincaid, Fog, SMOG) and text stats. Text never stored.

Business-day and public-holiday math for 29 countries: add business days, days between, holidays.