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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 — your data stays on your device.
  • 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
100% browser-based — no data is sent to any server
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. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.

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.