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Security Headers Builder — Free Online Tool

CSP + HSTS + X-Frame + Permissions-Policy + more

Generate complete security headers stack: CSP, HSTS, X-Frame-Options, X-Content-Type, Referrer-Policy, Permissions-Policy. Output for Apache / nginx / Cloudflare / Netlify.

Site setup

Headers to include

CSP customization

📄 Generated config

↗ Test at securityheaders.com
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Learn more

Security Headers Builder

Generate complete security headers stack: CSP, HSTS, X-Frame-Options, X-Content-Type, Referrer-Policy, Permissions-Policy. Output for Apache/nginx/Cloudflare/Netlify/Vercel.

How to use this tool

  1. 1

    Configure CSP + headers

    Toggle each header + customize.

  2. 2

    Pick your platform

    Apache / nginx / Cloudflare / Netlify / Vercel.

  3. 3

    Copy + deploy

    Paste into config / redirects / headers file.

Frequently Asked Questions

Why do I need security headers?
Modern browsers respect security headers to defend against XSS, clickjacking, MIME-sniffing, mixed content, and more. Properly configured: A+ on securityheaders.com (Scott Helme). Bad config: A or worse, exploitable. Site running without security headers in 2026 is asking for trouble.
CSP — too strict or too loose?
"unsafe-inline" + "unsafe-eval" defeat XSS protection. Strict CSP requires nonce or hash for inline scripts — work, but right move. Most starter CSPs are too loose (defeat purpose). Modern frameworks (Astro, Next.js) emit nonces; use them.
HSTS preload — should I?
HSTS = Strict-Transport-Security. Preload list = browsers force HTTPS even on first visit. ONLY add to preload list when 100% sure all subdomains support HTTPS. Removal from preload list takes weeks. Start: max-age=31536000 (1 year), no preload. Add preload after 1 month verified.

Key Takeaways

  • Security Headers Builder is a free, browser-based seo & web tool — csp + hsts + x-frame + permissions-policy + more.
  • No signup, no downloads, no file uploads. Tools run in your browser; the few that need an outside service say so on the page.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use Security Headers Builder

  1. Open the tool: Launch Security Headers Builder on Toololis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

Security Headers Builder — Quick Facts

Price
Free — no limits, no watermarks, no paywalls
Privacy
Processed in your browser. Tools that need an outside service say so on the page. Page views are counted (Google Analytics).
Platform
Any modern browser on desktop, tablet, or mobile
Category
SEO & Web Tools on Toololis
Offline
Works offline after first visit (Progressive Web App)
FeatureDetails
ToolSecurity Headers Builder
CategorySEO & Web
Signup RequiredNo
File UploadNone — processed in browser
Mobile SupportFully responsive
CostFree forever

Why Use Security Headers Builder?

You should try Security Headers Builder for a quick, private way to csp + hsts + x-frame + permissions-policy + more. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.