Scan any website's HTTP security headers and get an instant grade with actionable recommendations.
Security headers are just the beginning. ObserveOne monitors your entire application stack, uptime, performance, and security, around the clock.
Side-by-side breakdowns, no fluff.
HTTP security headers are your first line of defense against common web attacks like cross-site scripting (XSS), clickjacking, and protocol downgrade attacks. They instruct browsers on how to behave when handling your site's content, significantly reducing your attack surface with minimal implementation effort.
Forces browsers to only connect via HTTPS, preventing protocol downgrade attacks and cookie hijacking.
Controls which resources the browser is allowed to load, preventing XSS and data injection attacks.
Prevents your site from being embedded in iframes, protecting against clickjacking attacks.
Prevents browsers from MIME-sniffing the content type, reducing exposure to drive-by download attacks.
Controls how much referrer information is included with navigation requests, protecting user privacy.
Controls which browser features and APIs can be used, limiting exposure to feature abuse.
Verifies that all recommended security headers are present in your server's response.
Checks for weak configurations like missing includeSubDomains in HSTS or unsafe-inline in CSP.