HTTP Headers Analysis for https://www.javascriptcheck.com

Detected Technologies from Headers

See all in URL Inspect 2

Cloudflare NEL Monitoring

Cloudflare CDN

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=31556926

Content-Security-Policy

Good

default-src; script-src; style-src; +4 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Excellent

DENY

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Present

origin-when-cross-origin

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Strengthen CSP by removing 'unsafe-eval'
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

x-fh-requested-host, accept-encoding

connection: close
transfer-encoding: chunked
vary: x-fh-requested-host, accept-encoding

Caching Headers

Cache-Control

Caching

max-age=3600

Last-Modified

Caching

Sat, 05 Sep 2026 05:28:55 GMT

cache-control: max-age=3600
last-modified: Sat, 05 Sep 2026 05:28:55 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

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

a366098bbfa8d66f-IAD

Date

Other

Sat, 05 Sep 2026 14:48:51 GMT

Nel

Other

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

success: 0.0%

Report-To

Other

Group cf-nel max-age: 1w

Endpoint 1 https://a.nel.cloudflare.com/report/v4?s=su31cZ8yWDxt4snQ%2Fy4LM1po6KnChkZaA9wuBoTY2g1FSDZiIuDCpgAHyfTViCeu1fh9jX%2BT9L7ezZ456E0YzNQeBPcwyVttUzCS2h2zuHPbkfo6L8j74%2BntmHYm%2BteVvMd4xoFM

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=11,cfOrigin;dur=11

X-Cache

Other

HIT

X-Cache-Hits

Other

0

X-Served-By

Other

cache-iad-kiad7000161-IAD

X-Timer

Other

S1788619732.811596,VS0,VE5

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: a366098bbfa8d66f-IAD
date: Sat, 05 Sep 2026 14:48:51 GMT
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=su31cZ8yWDxt4snQ%2Fy4LM1po6KnChkZaA9wuBoTY2g1FSDZiIuDCpgAHyfTViCeu1fh9jX%2BT9L7ezZ456E0YzNQeBPcwyVttUzCS2h2zuHPbkfo6L8j74%2BntmHYm%2BteVvMd4xoFM"}]}
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=11,cfOrigin;dur=11
x-cache: HIT
x-cache-hits: 0
x-served-by: cache-iad-kiad7000161-IAD
x-timer: S1788619732.811596,VS0,VE5

Recommendations

Enable compression (gzip/brotli) to improve performance