HTTP Headers Analysis for https://embed.diagrams.net

Detected Technologies from Headers

See all in URL Inspect 1

Cloudflare CDN

HTTP Security Headers

Status

Strict-Transport-Security

Good

max-age=31536000; includeSubDomains

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin

Permissions-Policy

Missing

Not configured

Recommendations

• Consider adding 'preload' to HSTS for maximum security
• Add Content-Security-Policy header to prevent XSS attacks
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

accept-encoding

connection: close
transfer-encoding: chunked
vary: accept-encoding

Caching Headers

Age

Caching

359

Cache-Control

Caching

public, max-age=600

Expires

Caching

Tue, 31 Mar 2026 23:49:36 GMT

age: 359
cache-control: public, max-age=600
expires: Tue, 31 Mar 2026 23:49:36 GMT

Content Headers

Content-Type

Content

text/html

content-type: text/html

Server Headers

Server

cloudflare

server: cloudflare

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

9e533a85bdee787b-IAD

Date

Other

Tue, 31 Mar 2026 23:45:35 GMT

X-Cloud-Trace-Context

Other

ff32ce69cc27d066400a828f443b27ba

cf-cache-status: DYNAMIC
cf-ray: 9e533a85bdee787b-IAD
date: Tue, 31 Mar 2026 23:45:35 GMT
x-cloud-trace-context: ff32ce69cc27d066400a828f443b27ba

Recommendations

Enable compression (gzip/brotli) to improve performance