Security headers for react.dev

Security headers summary for react.dev

This page validates the HTTP security headers returned by react.dev, scoring its protection against common web attacks.

Below you can review which headers react.dev 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 react.dev

A higher score means react.dev 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 react.dev, as they provide the strongest protection against scripting and downgrade attacks.

Use cases

  • Audit the security headers of react.dev before or after a deploy.
  • Identify missing headers that increase attack risk on react.dev.
  • Verify that react.dev enforces HTTPS with HSTS.
  • Support hardening reports and security reviews for react.dev.

Frequently asked questions

Which security headers does react.dev use?

This page lists the HTTP security headers present on react.dev, such as CSP, HSTS, X-Frame-Options and X-Content-Type-Options, along with their values.

Does react.dev have a Content-Security-Policy?

The results show whether react.dev sends a Content-Security-Policy header and whether its value is considered secure.

Does react.dev enforce HTTPS with HSTS?

The Strict-Transport-Security section indicates whether react.dev forces HTTPS and for how long, including includeSubDomains and preload flags.

Why does react.dev have a low security score?

A low score means react.dev 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 react.dev free?

Yes. The XploreNetHub Security Headers Validator is completely free, requires no sign-up and runs directly in your browser.

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