HTTP Headers Analysis for https://demo.htmlcsstoimage.com

Detected Technologies from Headers

See all in URL Inspect 3

Cloudflare NEL Monitoring

Cloudflare CDN

Cloudflare Turnstile

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=31536000; includeSubDomains; preload

Content-Security-Policy

Basic

default-src; script-src; script-src-attr; +8 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Present

same-origin

Permissions-Policy

Present

accelerometer=(), browsing-topics=(), camera=(); +15 more

Recommendations

• Improve CSP by adding more specific directives and removing 'unsafe-inline'

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

connection: close
transfer-encoding: chunked

Caching Headers

Cache-Control

Caching

private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

Expires

Caching

Thu, 01 Jan 1970 00:00:01 GMT

cache-control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
expires: Thu, 01 Jan 1970 00:00:01 GMT

Content Headers

Content-Type

Content

text/html; charset=UTF-8

content-type: text/html; charset=UTF-8

Server Headers

Server

cloudflare

server: cloudflare

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: __cf_bm=DoYvE04yjTXfIulACjoI3Ng4b2OtZtKehtmwHm7vQWw-1777807981-1.0.1.1-x20TpL1gh2JZsbnDT2LFwPzgf4.Bq4L0CLJPTqJUxFyrMx8.Sw1aM.eVQk07FWk4.d0YEtBGlZ5M.tjQNgAeVZuzA5clD8.6aAIbVk_IoHA; path=/; expires=Sun, 03-May-26 12:03:01 GMT; domain=.codepen.io; HttpOnly; Secure

Other Headers

Accept-Ch

Other

Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Mitigated

Other

challenge

Cf-Ray

Other

9f5ef2ccefdbe5f0-IAD

Critical-Ch

Other

Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA

Date

Other

Sun, 03 May 2026 11:33:01 GMT

Nel

Other

Report-To Group cf-nel max-age: 1w

success: 0.0%

Origin-Agent-Cluster

Other

?1

Report-To

Other

Group cf-nel max-age: 1w

Endpoint 1 https://a.nel.cloudflare.com/report/v4?s=7GryIspBOCykBKxhY2SjCXIJ2ZmR30cQNB%2FCethNgegjjM370cCVGWc2CgeLLv7rMT2GnfW7P3ZU1PdzmHIt92CHXgnbwe7SLMTqIE2cA7SMkoVPh8bsBuQT7MHC0GPtknnBUxLg1VWb

Server-Timing

Other

chlray;desc="9f5ef2cd8183e647", cfEdge;dur=89,cfOrigin;dur=0,cfWorker;dur=22

Speculation-Rules

Other

"/cdn-cgi/speculation"

accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
alt-svc: h3=":443"; ma=86400
cf-mitigated: challenge
cf-ray: 9f5ef2ccefdbe5f0-IAD
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
date: Sun, 03 May 2026 11:33:01 GMT
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
origin-agent-cluster: ?1
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=7GryIspBOCykBKxhY2SjCXIJ2ZmR30cQNB%2FCethNgegjjM370cCVGWc2CgeLLv7rMT2GnfW7P3ZU1PdzmHIt92CHXgnbwe7SLMTqIE2cA7SMkoVPh8bsBuQT7MHC0GPtknnBUxLg1VWb"}]}
server-timing: chlray;desc="9f5ef2cd8183e647", cfEdge;dur=89,cfOrigin;dur=0,cfWorker;dur=22
speculation-rules: "/cdn-cgi/speculation"

Recommendations

Enable compression (gzip/brotli) to improve performance