Free Website Security Checker
Assess your website's security posture in under 60 seconds. Review HTTPS encryption, SSL/TLS certificates, defensive HTTP headers, and DNS email authentication.
How to Use This Tool
Run an automated assessment in three straightforward steps.
Enter Your Domain
Type your public website address (e.g. example.com). No code snippet, DNS verification, or account sign-in required.
Automated Inspection Runs
SiteSecura queries DNS records, initiates TLS handshakes, and analyzes HTTP responses in under 60 seconds.
Review Plain-English Findings
Examine your numerical score, categorized findings (Pass, Warning, Fail), and actionable code snippets for your web server.
Supported Website Security Checks
SiteSecura checks external perimeter configurations without sending intrusive attack payloads or altering your server.
HTTPS Availability & Redirects
Baseline ProtectionVerifies that your website responds over HTTPS and automatically redirects plain HTTP traffic to an encrypted channel.
SSL/TLS Certificate Validity & Expiry
Transport EncryptionInspects certificate chain validity, days remaining until expiration, issuer authority, and Subject Alternative Names (SAN).
Defensive HTTP Security Headers
Browser HardeningAudits HSTS (Strict-Transport-Security), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.
Domain Email Authentication (SPF & DMARC)
Brand & Email SecurityEvaluates SPF records and DMARC policies in domain DNS to detect spoofing vulnerability and email hygiene gaps.
Cookie Security Flags
Session ProtectionInspects cookies for essential defensive attributes including Secure, HttpOnly, and SameSite configuration.
Server Technology Disclosure
Information MinimizationChecks whether web server software versions and sensitive backend framework headers (X-Powered-By) are exposed to public clients.
Interpreting Scan Results
Every scan item receives an explicit status indicator to help you prioritize remediation.
The evaluated security control is active and adheres to recommended defensive configurations.
A defensive configuration is partially implemented or using suboptimal parameters (e.g. short HSTS max-age).
An important security setting is absent (such as no HTTPS redirect, missing CSP, or no SPF record).
Contextual details such as IP resolution, server software name, or selector-dependent checks (like DKIM).
Practical Remediation Guidance
How to resolve common gaps and harden your server configurations.
Website security remediation begins with closing the most exploitable perimeter gaps. SiteSecura categorizes findings into concrete fix recommendations:
1. Enforce HTTPS Everywhere
Configure web server redirects (HTTP 301) from port 80 to port 443. Enable automated certificate renewals via Let's Encrypt or your cloud CDN provider.
2. Add Strict-Transport-Security
Instruct browsers never to connect via unencrypted HTTP. Add the header with a 1-year duration: max-age=31536000; includeSubDomains.
3. Harden Defensive Headers
Prevent clickjacking with X-Frame-Options: SAMEORIGIN and stop MIME-sniffing with X-Content-Type-Options: nosniff.
4. Protect Your Domain Email
Publish SPF TXT records in DNS designating legitimate outbound email servers, and establish a DMARC policy (v=DMARC1; p=none initially) to monitor domain abuse.
Assessment Limitations & Technical Scope
SiteSecura performs deterministic, non-intrusive perimeter checks. Understanding what a passive assessment cannot evaluate ensures responsible risk management:
- •Passive perimeter inspection cannot detect SQL injection, broken authorization, or internal application bugs.
- •Does not simulate denial-of-service (DoS) or perform high-volume stress testing.
- •Cannot evaluate internal private subnets, localhost environments, or password-protected member portals.
- •A 100% score indicates strong perimeter hygiene, not an absolute guarantee against zero-day exploits or compromise.
- •Third-party external dependencies (e.g., embedded widgets) are evaluated only within observed response headers.
Recommended Technical Guides
Learn defensive concepts and architectural best practices from our engineering team.
Related Security Utilities
Explore dedicated perimeter verification tools in the SiteSecura toolkit.
SSL/TLS Certificate Checker
Inspect certificate expiration dates, CA issuer chain, SAN domain matching, and supported TLS protocol versions.
HTTP Security Headers Checker
Verify HSTS preload readiness, Content-Security-Policy (CSP) rules, and clickjacking protection headers.
SPF, DKIM & DMARC Checker
Audit DNS email-authentication records to protect your brand from email spoofing, phishing, and delivery drops.
DNS Lookup Tool
Inspect supported A, AAAA, CNAME, MX, NS, TXT, SOA, and CAA records with real-time resolution and explanations.
Frequently Asked Questions
Ready for a Complete Website Security Evaluation?
Run an end-to-end passive scan across HTTPS, SSL certificates, defensive HTTP response headers, and DNS email authentication records in under 60 seconds.