SSL Server Test (Powered by Qualys SSL Labs)
A comprehensive free SSL test for your public web servers.
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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.
π 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 RistiΔ at Qualys, created it to better understand SSL deployment worldwide and promote secure configurations through free tools and education.
β¨ 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
π 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
π₯ 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
πΈ Screenshots / Demo
- Live demo: https://www.ssllabs.com/ssltest
- GitHub: https://github.com/ssllabs
π₯ Project Status
- π’ Actively building
Last updated: 2026-03-24
β FAQ
Is this project free?
Yes β completely free online service with no registration or limits for public servers.
Is the source code available?
Partially β open source API client (ssllabs-scan) at https://github.com/ssllabs/ssllabs-scan. Core web scanner is proprietary.
Can I contribute?
Yes β submit issues/PRs to GitHub repos, provide feedback on SSL Labs projects page, or participate in SSL research discussions.
π¬ 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
Built with β€οΈ and kept warm on WarmIndex.
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