6 security categories Β· Free Β· Results in 60 seconds

Free Website Security Scanner

Scan your website for security vulnerabilities β€” headers, TLS, exposed files, DNS and reputation. Get a detailed report with exactly what to fix.

What the security scanner checks

6 security categories, 50+ individual checks in one free scan.

Security headers

CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy and Permissions-Policy checked.

TLS / HTTPS

Certificate validity, expiry date, HTTPS redirect and mixed content issues detected.

Exposed sensitive files

Tests if .env, .git/config, backup.sql, phpinfo.php and admin panels are publicly accessible.

Data leakage

Scans HTML for exposed emails, API keys (Stripe, AWS, GitHub) and sensitive code comments.

DNS security

SPF, DMARC and DNSSEC records verified. Missing records leave you vulnerable to email spoofing.

IP reputation

Your server IP checked against Spamhaus, SpamCop and SORBS blacklists.

Frequently asked questions

What security headers should every website have?

At minimum: HSTS (forces HTTPS), X-Content-Type-Options (prevents MIME sniffing), X-Frame-Options (prevents clickjacking) and Referrer-Policy. CSP is the most powerful but most complex to configure.

What is an exposed .env file?

A .env file contains environment variables like database passwords, API keys and secret tokens. If it's publicly accessible, attackers can steal credentials and gain full access to your systems. Scanlei tests for this and 10+ other exposed file patterns.

What does the DNS security scan check?

We verify SPF records (prevents email spoofing), DMARC records (policy for failed SPF/DKIM), and DNSSEC (cryptographic validation of DNS responses). Missing these makes your domain vulnerable to phishing attacks.

Can attackers actually find these issues?

Yes. Automated scanners constantly probe the internet for exactly these vulnerabilities. A .env file exposed for even a few hours can be found and exploited before you notice.

Related guides

Website Security Headers: The Complete Guide (CSP, HSTS, X-Frame-Options)

9 min read

Is your website secure?

Free security scan. No signup required. Results in 60 seconds.