HSTS Checker Tool
Comprehensive HTTP Strict Transport Security analysis and security assessment
Check a Domain
Enter any domain or URL below and we'll inspect its HSTS header, subdomain coverage, and preload status in seconds.
Tool Features
Comprehensive HSTS and security header analysis with recommendations
HSTS Detection
Check if HTTP Strict Transport Security is properly configured
Security Analysis
Comprehensive security header analysis and validation
Configuration Validation
Validate HSTS parameters and detect configuration issues
Security Score
Get an overall security score with improvement recommendations