Open SEO Security Tools — Website Security Exposure Scanner

Know what your website exposes to the public. Paste any website URL and get an automated passive security exposure audit — detecting exposed information, misconfigured headers, technology leaks, and more. No exploitation, just detection.

Whether you are a developer, security researcher, or website owner, understanding your public attack surface is the first step toward securing your web application. This scanner performs passive analysis only — it accesses the same resources any browser would receive, inspecting HTTP headers, HTML, cookies, and JavaScript files delivered to the client. No active probing, no exploitation, no brute force. Just clear, actionable security intelligence to help you identify and fix exposure points before they become vulnerabilities.

Open SEO Security Tools is a free and open-source scanner designed for developers, DevOps engineers, and security-conscious website owners. It helps you audit your website security posture without installing any software or sending traffic to third-party servers. Every scan runs server-side and checks for the same information a potential attacker would find through passive reconnaissance. Use it alongside other security practices such as regular dependency updates, content security policy enforcement, and automated vulnerability scanning to maintain a strong defense. For developers looking for SEO-focused site analysis, visit OpenSEO Labs for a comprehensive SEO toolkit. Programmatic access is also available through our API documentation.

Passive analysis only. We detect publicly available information — we do not exploit, brute force, or perform penetration testing.

What the Scanner Detects

Universal checks that work on any website, regardless of technology stack.

🛡️Security Headers

Analyzes CSP, HSTS, X-Frame-Options, X-Content-Type-Options, and more to flag missing or misconfigured HTTP security headers that could leave your site vulnerable to attacks like XSS, clickjacking, and MIME sniffing.

🔍Information Exposure

Detects publicly exposed server information, technology fingerprints, debug data, directory listings, and metadata leaks that attackers can use to build an attack surface map of your website.

🧩Technology Detection

Identifies the framework, CMS, frontend libraries, web server, and infrastructure powering the website, helping you understand what technologies your site or competitor sites are built with.

📜JavaScript Analysis

Scans client-side JavaScript for exposed API keys, hardcoded secrets, internal URLs, cloud service endpoints, and suspicious patterns that should never be present in public-facing code.

🗺️Source Map Detection

Checks if JavaScript source maps are publicly accessible, potentially exposing your original uncompiled source code, internal comments, and development-only code paths.

📋Security Report

Get a structured security exposure report with severity classification, risk scoring from 0 to 100, categorized findings, and a downloadable .txt summary for documentation and compliance.

How It Works

Paste URL

Enter the full website URL you want to scan.

Scan Website

The scanner runs universal and technology-specific checks.

Analyze Findings

Each finding is categorized, scored, and explained.

Get Report

View the detailed report or download it as a .txt file.

Security Philosophy

Detect Exposure, Don't Exploit. This tool only analyzes publicly accessible resources that any browser would receive when visiting a website.

The scanner accesses public pages, inspects HTTP response headers, cookies, HTML, and JavaScript delivered to the browser — the same information any visitor can see. It does not perform penetration testing, exploitation, brute force, credential attacks, or unauthorized access.

If you are a website owner, use this scanner to understand what information your website exposes to visitors and take appropriate action. Regular security exposure scanning helps maintain a strong security posture by catching configuration drift, forgotten debug endpoints, exposed API keys in JavaScript files, and missing security headers before they are discovered by malicious actors.

The scanner supports multiple technology stacks including WordPress, Next.js, Laravel, Django, Nuxt, Shopify, and Webflow, with technology-specific checks that go beyond universal scanning. Each finding is classified by severity — critical, high, medium, low, or informational — and the overall risk score provides a quick measure of your website's security exposure level.

Disclaimer

This tool is provided for educational and defensive security purposes only. It performs passive analysis of publicly available information. You should only scan websites you own or have explicit permission to test. The authors assume no liability for misuse of this tool or for actions taken based on its findings.