OWASP
Security & PrivacyOpen Web Application Security Project with free security tools and standards
securitywebstandardscommunity
Open Web Application Security Project with free security tools and standards
Developer security platform for finding and fixing vulnerabilities
Check if your email or password has been compromised in a data breach
Web security testing toolkit for finding vulnerabilities
Penetration testing framework for finding and exploiting vulnerabilities
Collection of API security resources and tools
Privacy-first CAPTCHA alternative