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

Detected Technologies from Headers

See all in URL Inspect 5

Cloudflare NEL Monitoring

Cloudflare CDN

Fastly

GitHub

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=15552000; includeSubDomains

Content-Security-Policy

Weak

frame-ancestors Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

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
• Significantly strengthen CSP directives
• 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

0

Cache-Control

Caching

max-age=600

Expires

Caching

Sun, 02 Aug 2026 10:22:16 GMT

Last-Modified

Caching

Mon, 27 Jul 2026 11:43:14 GMT

age: 0
cache-control: max-age=600
expires: Sun, 02 Aug 2026 10:22:16 GMT
last-modified: Mon, 27 Jul 2026 11:43:14 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

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

a24cbb7d4b3207fb-IAD

Date

Other

Sun, 02 Aug 2026 11:27:16 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=YoJNdqQx01Ycnj%2BMutjSJ3ozNWMVyE%2FNM9t1mfRPGMSfZHly7QWu0%2F70EFJ%2Fq7Ewig9aQwWLvnR1qeQ%2B9rOQWim9dvbsNz3V7CvheDH1BtNXVCuybpFIcTC2Wk8YGMHXwbeGNEE%3D

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=8,cfOrigin;dur=14

Via

Other

1.1 varnish

X-Cache

Other

HIT

X-Cache-Hits

Other

0

X-Dns-Prefetch-Control

Other

on

X-Fastly-Request-Id

Other

13973778345a2b0cf5a231dd0cd72768e0142bd3

X-Github-Edge-Region

Other

iad

X-Github-Request-Id

Other

E9E2:1265F7:1474CD4:185D429:6A6F1800

X-Proxy-Cache

Other

MISS

X-Served-By

Other

cache-iad-kiad7000028-IAD

X-Timer

Other

S1785670036.054287,VS0,VE9

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: a24cbb7d4b3207fb-IAD
date: Sun, 02 Aug 2026 11:27:16 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=YoJNdqQx01Ycnj%2BMutjSJ3ozNWMVyE%2FNM9t1mfRPGMSfZHly7QWu0%2F70EFJ%2Fq7Ewig9aQwWLvnR1qeQ%2B9rOQWim9dvbsNz3V7CvheDH1BtNXVCuybpFIcTC2Wk8YGMHXwbeGNEE%3D"}]}
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=8,cfOrigin;dur=14
via: 1.1 varnish
x-cache: HIT
x-cache-hits: 0
x-dns-prefetch-control: on
x-fastly-request-id: 13973778345a2b0cf5a231dd0cd72768e0142bd3
x-github-edge-region: iad
x-github-request-id: E9E2:1265F7:1474CD4:185D429:6A6F1800
x-proxy-cache: MISS
x-served-by: cache-iad-kiad7000028-IAD
x-timer: S1785670036.054287,VS0,VE9

Recommendations

Enable compression (gzip/brotli) to improve performance