Free HTTP Security Checker
Test how your site handles HTTP. Verify HTTP to HTTPS redirects, inspect the complete redirect chain and status codes, confirm HTTPS is enforced across your site, and catch protocol downgrade risks before an attacker does.
Redirect Analysis
Verify HTTP to HTTPS redirects are working correctly and analyze the complete redirect chain end to end
HTTPS Enforcement
Confirm every request is upgraded to HTTPS and that no content stays reachable over plain HTTP
Downgrade Protection
Spot protocol downgrade and mixed-content risks that let attackers force a connection back to HTTP
What We Check
HTTP to HTTPS Redirects
- Automatic redirect from HTTP to HTTPS
- Redirect status codes (301 vs 302)
- Complete redirect chain analysis
- Identification of redirect loops or issues
HTTPS Enforcement
- Whether the www and root hostnames both redirect
- Content still reachable over plain HTTP
- Final landing protocol after the redirect chain
- Canonical HTTPS destination consistency
Downgrade & Mixed Content
- Protocol downgrade exposure on first request
- Insecure resources loaded over HTTP
- Cookies sent without the Secure flag
- Opportunities for a man-in-the-middle to intercept
Security Recommendations
- Correct 301 redirect configuration
- Closing plain-HTTP access paths
- Hardening cookies for transport security
- Next steps to lock in HTTPS for every visitor
Why HTTP to HTTPS redirects matter
Most sites serve content over HTTPS, but the first request a browser makes is often plain HTTP. If that request is not redirected immediately, an attacker on the same network can intercept or tamper with it before encryption ever kicks in. A clean, single-hop redirect to HTTPS closes that window.
What a strong setup looks like:
- Immediate upgrade: HTTP requests redirect to HTTPS with a 301
- Short chains: one hop to the final HTTPS URL, no redirect loops
- Full coverage: both the root and www hostnames enforce HTTPS
- No plain HTTP leftovers: nothing stays reachable over an insecure connection
- Secure cookies: session cookies carry the Secure flag so they never travel over HTTP
To make browsers remember the upgrade and enforce HTTPS on the very first visit, pair your redirects with an HSTS policy. Validate your HSTS header and preload status.
What a healthy redirect chain looks like
Do
Use a 301 to HTTPS
Permanent redirects are cached by browsers and search engines
Redirect in a single hop
Go straight to the final HTTPS URL, not through extra stops
Cover root and www
Every hostname should land on the same canonical HTTPS address
Avoid
302 for the HTTPS upgrade
Temporary redirects are not cached and weaken enforcement
Long redirect chains
Each extra hop is slower and another chance to intercept
Plain HTTP that still responds
Content served over HTTP defeats the point of the redirect
Ideal redirect chain:
http://example.com → 301 → https://example.comRedirects fix the second visit. HSTS fixes the first.
A redirect only helps once the browser has made that first insecure request. HTTP Strict Transport Security tells browsers to upgrade to HTTPS automatically, even before the first connection, so there is no plain-HTTP request left to intercept.
Check your HSTS header and preload status →That's Just the Beginning
FREEThis HTTP Security Check scan caught some issues. Run a Full Security Scan to uncover hidden threats like exposed secrets, malicious scripts, and supply chain attacks this quick check missed.