HTTP Headers Analysis for https://devdocs.io
Analyzed on November 02, 2025 at 19:09 UTC
URL: https://devdocs.io | Status: 200
17 Headers
Total Found
HTTP Security Headers
Status
Strict-Transport-Security
Good
max-age=31536000; includeSubDomains
Content-Security-Policy
Good
default-src; script-src; font-src; +2 more
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Consider adding 'preload' to HSTS for maximum security
- • Strengthen CSP by removing 'unsafe-eval'
- • 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
3 headers
Connection
Performance
keep-alive
Transfer-Encoding
Performance
chunked
Vary
Performance
Accept-Encoding
Caching Headers
1 headers
Cache-Control
Caching
max-age=0, private, must-revalidate
Content Headers
1 headers
Content-Type
Content
text/html;charset=utf-8
Server Headers
1 headers
Server
Server
cloudflare
CORS Headers
0 headers
No CORS headers found
Cookies Headers
0 headers
No cookies headers found
Other Headers
9 headers
Alt-Svc
Other
h3=":443"; ma=86400
Cf-Cache-Status
Other
DYNAMIC
Cf-Ray
Other
9985ed728dfe90be-IAD
Date
Other
Sun, 02 Nov 2025 19:09:39 GMT
Nel
Other
{"report_to":"heroku-nel","response_headers":["Via"],"max_age":3600,"success_fraction":0.01,"failure_fraction":0.1}
Report-To
Other
{"group":"heroku-nel","endpoints":[{"url":"https://nel.heroku.com/reports?s=%2B1LVWme1YFzijfbUYFIBpHvTiYLX5NH86ktVCHPukC0%3D\u0026sid=1b10b0ff-8a76-4548-befa-353fc6c6c045\u0026ts=1762110579"}],"max_age":3600}
Reporting-Endpoints
Other
heroku-nel="https://nel.heroku.com/reports?s=%2B1LVWme1YFzijfbUYFIBpHvTiYLX5NH86ktVCHPukC0%3D&sid=1b10b0ff-8a76-4548-befa-353fc6c6c045&ts=1762110579"
Server-Timing
Other
cfEdge;dur=15,cfOrigin;dur=13
Via
Other
1.1 heroku-router
Recommendations
Enable compression (gzip/brotli) to improve performance
Analysis completed in 1ms