Blog
How-to guides and articles you can reference when the checker finds an issue. Step-by-step for Nginx, Apache, Cloudflare, WordPress, and more.
Bulk SSL Checker: How to Check Multiple Domains at Once
Check SSL and HTTPS for up to 10 domains in one go. Get grades, redirect chains, and certificates. Export to PDF or JSON, share report links. No signup.
Read moreHTTP/2 and HTTP/3: What They Are and How to Enable Them
HTTP/2 and HTTP/3 speed up your site with multiplexing and QUIC. Here's what they do and how to turn them on in Nginx and Cloudflare.
Read moreWhat Is Mixed Content and How to Fix It
Your page is HTTPS but some images, scripts or styles still load over HTTP. Browsers block them or warn. Here's how to find and fix mixed content on your site.
Read moreWhy HTTPS Matters for SEO (And How to Check Yours)
Google uses HTTPS as a ranking signal and prefers secure pages. Here's why it matters for SEO and how to see if your site is set up right.
Read moreSecurity Headers: What They Are and How to Set Them
Guide to HTTP security headers: HSTS, Content-Security-Policy, X-Frame-Options, and more. How to add them in Nginx, Apache, and Cloudflare.
Read moreHow to Fix a Redirect Loop
Step-by-step guide to fix redirect loops (ERR_TOO_MANY_REDIRECTS): trace the loop, fix conflicting rules in Nginx, Apache, Cloudflare.
Read moreHow to Fix SSL Certificate Errors
Step-by-step guide to fix SSL certificate errors: renewal (Let's Encrypt, certbot), certificate chain, Nginx, Apache, cPanel, Cloudflare.
Read moreHow to Fix HTTP to HTTPS Redirect
Step-by-step guide to set up a 301 redirect from HTTP to HTTPS on Nginx, Apache, Cloudflare, and WordPress.
Read moreHow to Install Nginx, Certbot, and SSL on Ubuntu 24
Step-by-step guide: install Nginx and Certbot on Ubuntu 24, configure a domain with Let's Encrypt SSL, and set up HTTPS redirect.
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