Guides, tutorials, and best practices for website security. Learn how to protect your site and improve your security grade.
SRI verifies that files loaded from CDNs haven't been tampered with. Learn how subresource integrity works, how to implement it, and when you need it.
Misconfigured CORS headers can expose your API and user data to attackers. Learn common CORS mistakes, how to test for them, and how to configure CORS securely.
Mixed content warnings happen when HTTPS pages load HTTP resources. Learn how to find mixed content, fix it, and prevent it from coming back.
DNS is the foundation of every website. Learn how to secure it with DNSSEC, CAA records, and proper DNS configuration to prevent hijacking and spoofing attacks.
Both X-Frame-Options and CSP frame-ancestors prevent clickjacking, but they work differently. Learn which to use, browser support, and migration tips.
Learn how to properly secure your website cookies with the SameSite, Secure, and HttpOnly attributes. Prevent XSS, CSRF, and session hijacking attacks.
Google uses HTTPS as a ranking signal. Learn how SSL certificates affect your SEO, how to migrate from HTTP, and common HTTPS pitfalls that hurt rankings.
Getting an F on your website security scan? Here are the most common reasons and step-by-step instructions to improve your grade to an A.
Learn how to scan your website for security vulnerabilities for free. Check SSL, security headers, cookies, DNS configuration, and server misconfigurations with one click.
Step-by-step guide to achieving an A+ SSL/TLS rating. Learn how to configure certificates, cipher suites, TLS versions, and HSTS for maximum security.
Content Security Policy (CSP) is the most powerful HTTP security header. Learn what CSP does, how to write your first policy, and common mistakes to avoid.
A comprehensive website security checklist covering SSL, headers, authentication, input validation, and more. Make sure your site is secure before going live.
HSTS (HTTP Strict Transport Security) forces browsers to use HTTPS. Learn how it works, how to enable it, and why every website needs it for security and SEO.
Learn how to add essential HTTP security headers like Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to protect your website from common attacks.