Content security policy checker

Get all the HTTP headers that an URL returns for a typical GET request.

Check if a website has HTTP Strict Transport Security (HSTS) enabled.

Check if a website returns a Referrer-Policy header and display its value.

Check if images on a webpage have the lazy loading attribute enabled for performance optimization.

Detects outdated HTML tags that should be replaced with modern alternatives.

Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.

Extract all the text of a website from the source code of the page.

Verify the time to first byte of any website.

Get all possible details about an SSL certificate.