Security Score

Comprehensive security audit for any domain — HTTPS, HSTS, security headers, SSL certificate, SPF, DMARC, and DNS. Get an A-F grade.

Run a check to see results

APIPOST /api/v1/web/security
4.8(16 votes)
3
checks performed
Try also: SSL Checker
Run Check

Key Features

100% Free

No registration required, unlimited checks

Instant Results

Real-time analysis with detailed output

REST API Access

Integrate into your workflow via API

Accurate Data

Live queries to authoritative sources

What is Security Score?

The security score tool performs a comprehensive, multi-layered security audit of any domain, checking everything from transport encryption to email authentication in a single scan. It evaluates HTTPS configuration and SSL certificate validity, HSTS (HTTP Strict Transport Security) implementation, security response headers (CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy), email authentication records (SPF, DMARC), and DNS security settings. Each check is weighted by importance and combined into an overall grade from A (excellent security posture) to F (critical vulnerabilities).

The tool provides specific, actionable recommendations for every failed or suboptimal check. This free website security checker is used by website owners who want a quick, comprehensive overview of their security posture, developers and DevOps engineers verifying security headers are properly deployed, compliance teams assessing whether websites meet security baseline requirements, SEO consultants auditing client sites (security is part of Google's page experience signals), and security professionals conducting initial reconnaissance of a domain.

How to Use

  1. 1Enter the domain name to audit (e.g., yourdomain.com)
  2. 2Click 'Run Check' to perform a comprehensive security scan across all categories
  3. 3Review your overall A-F grade — this is your domain's security health at a glance
  4. 4Examine each individual check: HTTPS, HSTS, security headers, SSL, SPF, DMARC
  5. 5Read the specific recommendations for each failed or warning-level check
  6. 6Implement fixes starting with the highest-impact items, then re-scan to verify improvement

Who Uses This

System Administrators

Monitor and troubleshoot infrastructure

Developers

Debug network issues and integrate via API

SEO Specialists

Verify domain configuration and performance

Security Analysts

Audit and assess network security

Frequently Asked Questions

How do I check if my website is secure?
Enter your domain in the Security Score tool and run the check. It performs a multi-layered audit covering HTTPS/SSL configuration, HTTP security headers, email authentication (SPF, DMARC), and DNS security settings. The result is an A-F grade with detailed findings for each category and specific recommendations for improvement. This gives you a comprehensive view of your website's security posture in a single scan, covering the most common security configurations that protect your visitors and your domain.
What is a good security score and what should I aim for?
An A grade means all critical security checks pass — HTTPS is properly configured with a valid certificate, HSTS is enabled, all recommended security headers are present, and email authentication (SPF, DMARC) is configured. Most websites should aim for at least a B grade. Common issues that lower scores include: missing Content-Security-Policy header (prevents XSS attacks), no HSTS (allows protocol downgrade attacks), missing X-Frame-Options (enables clickjacking), expired or weak SSL certificates, and absent SPF/DMARC records. Even fixing just the top 2-3 issues usually improves the grade significantly.
What security headers does my website need?
Essential HTTP security headers include: Strict-Transport-Security (HSTS) — forces browsers to always use HTTPS, preventing protocol downgrade and cookie hijacking. Content-Security-Policy (CSP) — controls which resources can load on your pages, preventing XSS and data injection. X-Frame-Options — prevents your site from being embedded in iframes on other domains, stopping clickjacking attacks. X-Content-Type-Options: nosniff — prevents MIME type sniffing, stopping certain attack vectors. Referrer-Policy — controls how much referrer information is sent with requests, protecting user privacy. Permissions-Policy — controls which browser features your site can use (camera, geolocation, etc.).
Does website security affect SEO?
Yes — security is part of Google's page experience ranking signals. HTTPS is a confirmed ranking factor since 2014. Sites without valid HTTPS are marked 'Not Secure' in Chrome, which increases bounce rates and reduces trust. Additionally, a domain that gets compromised and serves malware or phishing pages can be flagged in Google Safe Browsing, resulting in dramatic traffic loss. Proper email authentication (SPF, DMARC) prevents your domain from being used in phishing campaigns that could damage your brand reputation. Investing in security is investing in your SEO.
How often should I run a security audit?
Run a security check at least monthly as routine maintenance, and always after: deploying changes to your web server configuration, updating or renewing SSL certificates, changing hosting providers or CDN, modifying DNS records, experiencing a security incident, and before and after major site launches or migrations. Many security configurations can drift over time — a header that was present might be removed during a server update, or an SSL certificate might expire without notice. Regular scanning catches these issues before they become problems.

Related Articles

Mastering Reverse IP Lookup: Your Ultimate GuideGuide

Mastering Reverse IP Lookup: Your Ultimate Guide

Unlock the secrets of reverse IP lookup to enhance your cybersecurity strategy. Discover how it works, its practical uses, and future trends.

NetVizor Team
Mar 25, 2026
Master Subdomain Verification: Real-World TechniquesGuide

Master Subdomain Verification: Real-World Techniques

Master subdomain verification with real-world techniques and tools. Learn to improve security and SEO with effective strategies.

NetVizor Team
Mar 21, 2026
Cybersecurity News: Are You Prepared for the Latest Threats?News

Cybersecurity News: Are You Prepared for the Latest Threats?

Stay updated on latest cybersecurity threats. Learn how breaches impact you and protect your data effectively.

NetVizor Team
Mar 21, 2026

Related Tools

SSL Checker

HTTP Headers

Port Scanner

Blacklist Check

Popular Tools

DNS Lookup

WHOIS Lookup

Domain Age

Nameserver Checker

API Endpoint

POST /api/v1/web/security
View Documentation