Free Website Security Checker: Scan Any Site for Vulnerabilities and SSL Issues
Scan any website for security vulnerabilities with our free online Website Security Checker. Check SSL certificates, security headers, exposed files, cookie security, and 15+ security points.
Free Website Security Checker: Scan Any Site for Vulnerabilities and SSL Issues
Every 39 seconds, a new cyberattack occurs on the internet. Whether you're running a personal blog, an e-commerce store, or an enterprise application — your website is being scanned by automated bots right now, looking for vulnerabilities to exploit.
The Website Security Checker by Jayax.dev is a free, comprehensive tool that scans any website for 15+ security vulnerabilities — regardless of the technology stack. No signup, no installation, results in under 60 seconds.
What's at Stake: Website Security by the Numbers
Global Cybersecurity Statistics
| Statistic | Number | |-----------|--------| | Websites attacked daily | ~30,000 | | Average cost of a data breach | $4.45 million | | Small business cyber attacks per year | 43% of all attacks | | SMBs that close after major attack | 60% within 6 months | | Websites with inadequate SSL | ~20% | | Sites missing security headers | ~55% |
What Hackers Look For
When bots scan your website, they check for:
- SSL/TLS configuration — Can they intercept data?
- Security headers — Is the site vulnerable to clickjacking, XSS?
- Software versions — Any known vulnerabilities?
- Open ports and services — What's running on the server?
- Exposed admin panels — Can they access the backend?
- Cookie security — Can they steal session tokens?
- Mixed content — Are there HTTP resources on HTTPS pages?
What the Website Security Checker Scans
1. SSL/TLS Certificate Analysis
Certificate Validity
- What it checks: Whether the SSL certificate is valid, not expired, and matches the domain
- Why it matters: Invalid certificates mean browsers show warnings, and data is not encrypted
- How to fix: Renew certificates before expiry. Use Let's Encrypt for free auto-renewing certificates
Protocol Support
- What it checks: Which TLS versions are supported (TLS 1.0, 1.1, 1.2, 1.3)
- Why it matters: TLS 1.0 and 1.1 are deprecated and have known vulnerabilities (POODLE, BEAST)
- How to fix: Disable TLS 1.0 and 1.1 on your server. Only allow TLS 1.2 and 1.3
HTTPS Enforcement
- What it checks: Whether HTTP requests redirect to HTTPS
- Why it matters: Without redirection, users can access the insecure version of your site
- How to fix: Set up 301 redirect from HTTP to HTTPS. Add HSTS header
Mixed Content
- What it checks: Whether HTTPS pages load HTTP resources (images, scripts, stylesheets)
- Why it matters: Mixed content warnings scare visitors and can be exploited for man-in-the-middle attacks
- How to fix: Update all resource URLs to use HTTPS or protocol-relative URLs
2. Security Headers Analysis
The scanner checks for 7 critical security headers:
| Header | Purpose | Risk if Missing | |--------|---------|-----------------| | Content-Security-Policy | Controls resource loading | XSS attacks | | Strict-Transport-Security | Forces HTTPS | SSL stripping | | X-Frame-Options | Prevents clickjacking | UI redress attacks | | X-Content-Type-Options | Prevents MIME sniffing | Content type confusion | | X-XSS-Protection | Browser XSS filter | Cross-site scripting | | Referrer-Policy | Controls referrer data | Information leakage | | Permissions-Policy | Controls browser features | Unauthorized feature access |
Each header is checked for presence and correct configuration.
3. Cookie Security Audit
Secure Flag
- What it checks: Whether cookies are only sent over HTTPS
- Why it matters: Without the Secure flag, cookies are sent in plaintext over HTTP connections
- How to fix: Set
Secureattribute on all cookies
HttpOnly Flag
- What it checks: Whether cookies are inaccessible to JavaScript
- Why it matters: Without HttpOnly, XSS attacks can steal session cookies
- How to fix: Set
HttpOnlyattribute on session and authentication cookies
SameSite Attribute
- What it checks: Whether cookies have SameSite protection
- Why it matters: Without SameSite, cookies are sent with cross-site requests (CSRF vulnerability)
- How to fix: Set
SameSite=StrictorSameSite=Laxon all cookies
4. Server Information Disclosure
Server Header
- What it checks: Whether server software and version are disclosed
- Why it matters: "Apache/2.4.41" tells attackers exactly which vulnerabilities to try
- How to fix: Configure your web server to suppress the Server header
X-Powered-By Header
- What it checks: Whether backend technology is disclosed
- Why it matters: "Express" or "PHP/8.1" reveals your technology stack
- How to fix: Remove via framework configuration or middleware
Technology Fingerprinting
- What it checks: Detects visible technology indicators (meta generators, framework-specific patterns)
- Why it matters: Reduces the reconnaissance effort for attackers
- How to fix: Remove generator meta tags and framework-specific comments
5. DNS & Infrastructure
DNS Configuration
- What it checks: DNS records, including MX, TXT (SPF, DKIM, DMARC)
- Why it matters: Proper DNS configuration prevents email spoofing and domain hijacking
- How to fix: Set up SPF, DKIM, and DMARC records for your domain
DNSSEC Status
- What it checks: Whether DNS Security Extensions are enabled
- Why it matters: DNSSEC prevents DNS spoofing and cache poisoning attacks
- How to fix: Enable DNSSEC through your domain registrar
How to Use the Website Security Checker
Quick Start
- Visit jayax.dev/tools/website-security-checker
- Enter any website URL (e.g.,
https://example.com) - Click "Analyze"
- Get results in 30-60 seconds
- Review each category and follow fix recommendations
- Download or share your report
Understanding Your Security Grade
| Grade | Score | Status | |-------|-------|--------| | A+ | 95-100 | Exceptional security posture | | A | 90-94 | Excellent — minor improvements possible | | B | 80-89 | Good — some issues to address | | C | 70-79 | Fair — notable vulnerabilities found | | D | 60-69 | Poor — significant security gaps | | F | Below 60 | Critical — immediate remediation needed |
Website Security Best Practices
For Every Website Owner
- Always use HTTPS — no exceptions
- Set security headers — use your web server or CDN configuration
- Keep software updated — CMS, plugins, server software
- Use strong, unique passwords — enable 2FA where possible
- Regular backups — automated, off-site, tested
- Monitor for changes — file integrity monitoring
- Use a CDN/WAF — Cloudflare, Sucuri, or similar
- Scan regularly — at least monthly, and after any changes
Security Headers Quick Reference
Apache (.htaccess):
<IfModule mod_headers.c>
Header set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
Header set X-Frame-Options "SAMEORIGIN"
Header set X-Content-Type-Options "nosniff"
Header set X-XSS-Protection "1; mode=block"
Header set Referrer-Policy "strict-origin-when-cross-origin"
Header set Permissions-Policy "camera=(), microphone=(), geolocation=()"
</IfModule>
Nginx:
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
FAQ — Website Security Checker
Is this tool free?
Yes, completely free with no limits. Scan as many websites as you need, as often as you want.
Can I scan any website?
You can scan any publicly accessible website. The tool only checks information that is already publicly visible — it does not attempt to access private areas or exploit vulnerabilities.
How accurate are the results?
The scanner checks for real, observable security configurations. Results are based on actual HTTP responses, SSL certificate data, and publicly available information. However, no automated tool can replace a comprehensive manual security audit.
Does the scanner work with all types of websites?
Yes. The Website Security Checker is technology-agnostic — it works with WordPress, Laravel, Next.js, React, static sites, e-commerce platforms, and any other web technology.
What's the difference between this and framework-specific checkers?
The general Website Security Checker covers universal security concerns (SSL, headers, cookies, DNS). For framework-specific vulnerabilities, use our specialized scanners:
How do I fix the issues found?
Each finding includes a specific remediation guide with code examples. For most issues, fixes can be applied in minutes through your web server configuration, CDN settings, or application code.
Scan Your Website Now
Don't wait for a breach to discover your vulnerabilities. Get your free security report in 60 seconds.
→ Check Your Website Security Now
Related Articles:
- WordPress Security Checker Guide
- Laravel Security Audit Guide
- Next.js Security Scanner Guide
- React Security Audit Guide
- Online Security & Encoding Tools
Get a comprehensive security audit in 60 seconds with the free Website Security Checker by Jayax.dev.
