HTTP Headers Analysis for https://svelte.dev
Analyzed on November 02, 2025 at 19:11 UTC
URL: https://svelte.dev | Status: 200
14 Headers
Total Found
HTTP Security Headers
Status
Strict-Transport-Security
Present
max-age=63072000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Add X-Content-Type-Options: nosniff
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • Consider adding Permissions-Policy to control browser features
Performance Headers
1 headers
Accept-Ranges
Performance
bytes
Caching Headers
4 headers
Age
Caching
66728
Cache-Control
Caching
public, max-age=0, must-revalidate
Etag
Caching
"d664d95a6d12977c7f05c11ff62609b3"
Last-Modified
Caching
Sun, 02 Nov 2025 00:39:14 GMT
Content Headers
3 headers
Content-Disposition
Content
inline
Content-Length
Content
89779
Content-Type
Content
text/html; charset=utf-8
Server Headers
1 headers
Server
Server
Vercel
CORS Headers
1 headers
Access-Control-Allow-Origin
Cors
*
Cookies Headers
0 headers
No cookies headers found
Other Headers
3 headers
Date
Other
Sun, 02 Nov 2025 19:11:22 GMT
X-Vercel-Cache
Other
HIT
X-Vercel-Id
Other
iad1::djd77-1762110682921-bf177915f835
Recommendations
Enable compression (gzip/brotli) to improve performance
Analysis completed in 1ms