What this page helps you understand
Security headers are not a substitute for secure code, but they are a strong baseline. Fixnx reports missing and weak headers without letting header-only issues outrank confirmed exploitable vulnerabilities.
What this scan checks
HSTS
Content Security Policy
X-Frame-Options
X-Content-Type-Options
Referrer-Policy
Permissions-Policy
Security headers are a baseline, not the whole story
Headers help browsers enforce safer behavior, but a missing header should not be treated the same as confirmed SQL injection or authentication bypass. Priority matters.
Fixnx checks the common browser protections and explains what they do in plain language. The report keeps hardening recommendations useful while still prioritizing higher-impact vulnerabilities.
Use this page when you want a quick header review before sending a site to customers or auditors.
Example Fixnx finding
Issue: Referred scan found missing browser protection
Risk: Medium
Evidence: A referred user's first website scan reported a missing browser security header.
Recommended fix: Share the invite link, have the friend run their first scan with a different email, then review and fix the highest-priority report items.
The referral program gives friends a practical reason to run a real website check and see useful security evidence.
What to fix first
- Critical exposed files, admin panels, secrets, or takeover paths.
- Broken HTTPS, missing redirects, weak SSL/TLS behavior, or unsafe cookie handling.
- Confirmed injection, XSS, access-control, authentication, or sensitive API evidence.
- High-impact security headers and browser protections that reduce attack impact.
- Medium and low hardening recommendations after the risky public evidence is fixed.
Trusted resources behind this guidance
Recommended Fixnx path
Follow these related pages to move from the current topic into the right scanner, guide, report, or comparison page without mixing search intent.
Review browser-facing web security signals and report structure.
Website Security HeadersUnderstand CSP, HSTS, framing, referrer, and browser hardening signals.
XSS ScannerCheck reflected, stored, and browser-side injection signals.
SSL & TLS Security CheckCheck HTTPS redirects, certificate behavior, HSTS readiness, and TLS signals.
Sample Security ReportSee how Fixnx presents findings, severity, evidence, and fix order.
Run this check on your site
Enter a public URL and get a live Fixnx report with security, SEO, and performance checks.
Only scan websites you own or have explicit permission to test. Fixnx is built for defensive security checks and website protection. Unauthorized scanning may be illegal.
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FAQ
Which security header matters most?
It depends on the app. HSTS and CSP are often important, but the right priority depends on exposure and confirmed risks.
Can headers fix vulnerable application code?
No. Headers reduce browser-side risk, but server-side vulnerabilities still need code and configuration fixes.
What does Security Headers Scanner check first?
It starts with hsts, then reviews content security policy, x-frame-options, and other public signals that can be checked safely from outside the site.
Can I use Security Headers Scanner on any website?
Only scan websites you own or have explicit permission to test. Fixnx is built for defensive security checks and website protection. Unauthorized scanning may be illegal.
Does Security Headers Scanner prove a site is completely secure?
No. A scan reports the public evidence it collected during a bounded test. It helps you find visible risk, but it cannot guarantee that every private workflow or server-side issue is safe.
Can Fixnx help me understand how to fix the findings?
Yes. Fixnx reports include evidence, severity, confidence, and remediation guidance so owners, developers, and security teams can decide what to fix first.