Security headers summary for jsdelivr.net
This page validates the HTTP security headers returned by jsdelivr.net, scoring its protection against common web attacks.
Below you can review which headers jsdelivr.net sends, which are missing, and recommendations to harden the configuration.
What are HTTP security headers?
HTTP security headers are response headers that instruct the browser to apply protective policies, mitigating attacks such as XSS, clickjacking and content sniffing.
Key headers include Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options and Referrer-Policy.
How to interpret the headers of jsdelivr.net
A higher score means jsdelivr.net sends more of the recommended security headers with secure values. Missing headers are highlighted so you know what to add.
Focus first on CSP and HSTS for jsdelivr.net, as they provide the strongest protection against scripting and downgrade attacks.
Use cases
- Audit the security headers of jsdelivr.net before or after a deploy.
- Identify missing headers that increase attack risk on jsdelivr.net.
- Verify that jsdelivr.net enforces HTTPS with HSTS.
- Support hardening reports and security reviews for jsdelivr.net.
Frequently asked questions
Which security headers does jsdelivr.net use?
This page lists the HTTP security headers present on jsdelivr.net, such as CSP, HSTS, X-Frame-Options and X-Content-Type-Options, along with their values.
Does jsdelivr.net have a Content-Security-Policy?
The results show whether jsdelivr.net sends a Content-Security-Policy header and whether its value is considered secure.
Does jsdelivr.net enforce HTTPS with HSTS?
The Strict-Transport-Security section indicates whether jsdelivr.net forces HTTPS and for how long, including includeSubDomains and preload flags.
Why does jsdelivr.net have a low security score?
A low score means jsdelivr.net is missing important headers or sends insecure values. The missing-headers and recommendations sections explain how to improve it.
Is the security headers check for jsdelivr.net free?
Yes. The XploreNetHub Security Headers Validator is completely free, requires no sign-up and runs directly in your browser.
Related guides
- Security Headers Checklist — HSTS, CSP and HTTP headers before go-live.
- DNS and SSL Checklist — Steps and verification table before pointing a domain.