Security Headers

Test SSL/TLS configuration of any website. Industry standard for SSL analysis.

Check if your email or phone was in a data breach. Free service by Troy Hunt, essential for security awareness.

Analyze files and URLs for malware. Scans with 70+ antivirus engines and URL/domain blocklists.

Search engine for Internet-connected devices. See what's exposed on the internet. Essential for security researchers.

Web archiving tool by Rhizome that lets you create interactive archives of web content. Preserves dynamic websites, social media, and complex web applications.

Bruce Schneier's security blog. Cryptographer and security expert writing since 2004.