Qualys SSL Labs' SSL Server Test is a free online tool that performs a deep and comprehensive analysis of the SSL/TLS configuration of any public web server, providing grades and detailed reports to help improve security.

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🚀 Overview

The SSL Server Test is a widely-used service from Qualys SSL Labs that scans public web servers for SSL/TLS misconfigurations, vulnerabilities, and best practices compliance. It generates an easy-to-understand grade (A+ to F) along with in-depth reports on protocols, ciphers, certificates, and more.

What problem does this project solve? Poorly configured SSL/TLS setups are rampant and leave websites vulnerable to attacks like man-in-the-middle, downgrade attacks, and certificate issues. This tool identifies these problems quickly.

Who is it built for? Web developers, system administrators, security professionals, and anyone responsible for public-facing HTTPS servers.

Why did you build it? SSL Labs, a non-commercial research effort run by Ivan Ristić at Qualys, created it to better understand SSL deployment worldwide and promote secure configurations through free tools and education.

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✨ Key Features

• Deep scan assessing cipher suites, protocol support, certificate chain, vulnerabilities (e.g., Heartbleed, POODLE), and handshake simulation
• Overall security grade (A+ to F) with detailed explanations and recommendations
• Public 'Boards' showing recent tests, top/bottom performers; option to hide results
• API access for programmatic testing and bulk assessments
• Optional: Experimental features via API v3 for advanced simulations

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🛠 Tech Stack

• Frontend: HTML, CSS, JavaScript
• Backend: Custom SSL/TLS scanner engine (proprietary)
• Database: Internal for caching/boards (details private)
• Auth: None (public service)
• Hosting: Qualys cloud infrastructure

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👥 Who Is This For?

This project is useful for:

• Developers who want to verify and harden HTTPS configurations
• Teams looking for quick SSL audits without installing software
• Indie makers building secure web apps and sites

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📸 Screenshots / Demo

• Live demo: https://www.ssllabs.com/ssltest
• GitHub: https://github.com/ssllabs

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Yes — completely free online service with no registration or limits for public servers.

Is the source code available?

Partially — open source API client (ssllabs-scan) at https://github.com/ssllabs/ssllabs-scan. Core web scanner is proprietary.

Can I contribute?

Yes — submit issues/PRs to GitHub repos, provide feedback on SSL Labs projects page, or participate in SSL research discussions.

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📬 Contact & Links

• Website: https://www.ssllabs.com/
• GitHub: https://github.com/ssllabs
• Twitter/X: https://x.com/ssllabs
• Email: Contact via Qualys support or projects page

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