HTTP Security & Performance
Paste your URL. HeadersFixer scans your live HTTP headers and generates stack-specific config for Nginx, Cloudflare, Vercel, Apache, and Express.
Detects missing or misconfigured security headers. Generates stack-specific fixes for Nginx, Apache, Vercel, Cloudflare, and Express.
Your URL never leaves your browser — this is a live client-side fetch
Tip: get headers with curl -sI https://your-domain.com
Detected:
About HeadersFixer
What does HeadersFixer check?
HeadersFixer fetches live HTTP response headers from your URL and checks for missing or misconfigured security headers including Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.
How does stack detection work?
The tool reads the Server response header and proxy-specific headers (Cf-Ray for Cloudflare, X-Vercel-ID for Vercel, X-NF-Request-ID for Netlify) to identify your stack. Config output is then tailored to that stack — Nginx, Apache, Cloudflare, Vercel, Express, or Caddy.
Is my URL stored or logged?
No. The fetch happens client-side in your browser via a stateless Cloudflare Worker proxy. Your URL is not stored, logged, or associated with any account.
Which security headers matter most?
Strict-Transport-Security prevents downgrade attacks. Content-Security-Policy reduces XSS risk. X-Frame-Options blocks clickjacking. X-Content-Type-Options prevents MI sniffing. These four cover the most common vulnerabilities addressed by HTTP headers.