HTTPS Checker

Security Tool

HTTPS, SSL & Security Report for sherwininc.com

This report summarizes how well sherwininc.com is configured for secure web delivery. It covers HTTPS availability, HTTP→HTTPS redirects, TLS/SSL certificate validity, security headers, HTTP/2 and HTTP/3 support, and mixed content. Use it to quickly spot configuration gaps and improve your site's security and trust.

SecureScore95/100Last checked: 21 Aug 2026 at 21:46 UTC
HTTPS

Enabled

HTTP → HTTPS

Yes

TLS

A · 1.2, 1.3

Security headers

3/6

Detailed checks

HTTPS availability

The site is reachable over HTTPS.

Why it matters: HTTPS encrypts traffic and protects user data.

HTTP to HTTPS redirect

Requests to HTTP are redirected to HTTPS.

TLS & CertificateA

Redirects to www.sherwininc.com — same certificate covers both hosts.

ValidYes
IssuerC=US, O=Let's Encrypt, CN=YR2
Expires2026-09-30
Days until expiry39 days
OCSP staplingNo

Why it matters: A valid, non-expired certificate ensures encryption is trusted by browsers.

To improve your grade

  • •Improve: Security Headers (+5 pts).
  • •For A+: add Content-Security-Policy.

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Grade breakdown2 things to improve for a higher grade →
95/100 pts
HTTPS Connection
+25/25
HTTP to HTTPS Redirect
+20/20
Valid SSL Certificate
+20/20
Certificate Not Expiring Soon
+10/10
Short Redirect Chain
+5/5
HSTS Enabled
+5/5
Security Headers
+0/5

Requires 4 of 6 headers and Content-Security-Policy (CSP).

Modern TLS (no 1.0/1.1)
+10/10

To improve your grade

  • •Improve: Security Headers (+5 pts).
  • •For A+: add Content-Security-Policy.

Security headers3/6

  • HSTS
  • CSP
  • X-Frame-Options
  • X-Content-Type-Options
  • Referrer-Policy
  • Permissions-Policy

Score: 3 of 6 headers effective. For the grade factor (5 pts), 4+ headers and Content-Security-Policy (CSP) are both required.

Cache-Control includes no-store on the HTML response. Browsers will not cache the document; ETag and conditional requests (304) are effectively disabled. Often intentional for authenticated pages; for public pages consider private with max-age or removing no-store if you want HTTP caching.

HSTS (HTTP Strict Transport Security)Enabled

  • EnabledYes
  • Max-Age730 days
  • PreloadNo
Submit or verify on hstspreload.org

Why it matters: HSTS tells browsers to use only HTTPS for this site. Preload allows inclusion in browsers’ built-in HSTS lists.

We check Chromium’s built-in list. hstspreload.org checks eligibility for submission (HSTS header, redirect chain). Results may differ for domains that are preloaded but no longer meet current eligibility rules.

HTTP/2

Negotiated (ALPN h2)

ALPN: h2

HTTP/3 (QUIC)

Advertised + confirmed

Alt-Svc: h3=":443"; ma=2592000, h3-29=":443"; ma=2592000

Active QUIC negotiation succeeded (curl --http3).

DNS Security

CAA: Not set · DNSSEC: Not signed · HTTPS record: Not setExpand
CAANot set
DNSSEC
Not signed
HTTPS Record
Not set

No HTTPS record. Browsers discover protocols via connection — an HTTPS record speeds this up. Learn more →

No CAA records. Any CA can issue certificates. Consider adding CAA to restrict issuance.

Mixed content

None detected

No HTTP resources were detected on the HTTPS page.

Redirect chain1183ms total

When you visit the site over HTTP, the server may send you through one or more redirects until you land on the final HTTPS URL. Shorter chains are faster and better for SEO.

  1. 1.http://sherwininc.com145ms
  2. 2.https://www.sherwininc.com/1038ms

Recommendations for sherwininc.com

Based on this scan, here are the 3 next steps that would most improve security and SEO for sherwininc.com.

  1. Add 3 missing security headers

    Recommended

    sherwininc.com sends 3 of 6 recommended security headers — missing: CSP, Referrer-Policy, Permissions-Policy. Most take one line of server config and protect against clickjacking, MIME sniffing and data leaks.

    How to set security headers What each header does

  2. Add a CAA DNS record

    Nice to have

    sherwininc.com has no CAA record, so any certificate authority can issue certificates for it. A CAA record limits issuance to the CAs you actually use — a cheap defense against mis-issuance.

    What is a CAA record

  3. Enable OCSP stapling

    Nice to have

    sherwininc.com did not staple an OCSP response on the TLS handshake. Stapling saves a round-trip for visitors and keeps revocation checks off the CA. Informational — it does not affect the SSL grade.

    How to enable OCSP stapling

Show this badge on your site

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</a>

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