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A free SSL Labs alternative for quick SSL certificate, HTTPS, redirect, mixed-content, HTTP/3, headers, and browser-facing security checks.
Recommended workflow
Check certificate validity, issuer, expiry, hostname coverage, and browser trust basics.
Open SSL Certificate CheckerRun redirect and mixed-content checks to catch pages that still load insecure resources or send users through weak chains.
Open Redirect Chain TracerUse Security Headers, Cookie Check, HTTP/3, and CSP Generator to improve the surrounding security posture.
Open Security Headers GradeBest fit
Not built for
Included checks
Check if your website SSL certificate is valid and secure
Grade your security headers (CSP, HSTS, X-Frame, etc.)
Find insecure HTTP resources on HTTPS pages
Trace the full redirect chain from URL to final destination
Inspect all HTTP response headers
Check if a website supports HTTP/2 or HTTP/3 (QUIC)
Audit cookies, tracking scripts, and GDPR compliance signals
Build Content-Security-Policy headers visually
Comparison
FAQ
No. CheckWebs focuses on quick SSL and related website security checks. Use SSL Labs when you need deeper TLS protocol grading.
Run redirect, mixed-content, security headers, HTTP/3, cookie, and CSP checks to catch the issues users actually hit in browsers.
Yes. It is useful for confirming certificates, redirects, mixed content, and hardening headers before and after launch.
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