HTTP Headers Analysis for https://jeremia.tech

SSL Verification Bypassed

The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.

Reason:

Hostname Mismatch - certificate is issued for *.github.com, *.github.io, *.githubusercontent.com, github.com, github.io, githubusercontent.com, not for jeremia.tech

Open Cached · just now

16 Headers

Detected Technologies from Headers

See all in URL Inspect 3

Fastly

GitHub

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Good

default-src; style-src; img-src; +1 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• 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

Accept-Ranges

Performance

bytes

Vary

Performance

Accept-Encoding

accept-ranges: bytes
vary: Accept-Encoding

Caching Headers

Age

Caching

Etag

Caching

"69f4d74c-239b"

age: 0
etag: "69f4d74c-239b"

Content Headers

Content-Length

Content

9115

Content-Type

Content

text/html; charset=utf-8

content-length: 9115
content-type: text/html; charset=utf-8

Server Headers

Server

GitHub.com

server: GitHub.com

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sun, 03 May 2026 23:01:20 GMT

Via

Other

1.1 varnish

X-Cache

Other

MISS

X-Cache-Hits

Other

X-Fastly-Request-Id

Other

b572b0932e90cc3b4b77978c9fa1079a58eebf15

X-Github-Request-Id

Other

3164:159B0A:2D85E8F:30E7714:69F7D3BF

X-Served-By

Other

cache-ewr-kewr1740033-EWR

X-Timer

Other

S1777849280.399770,VS0,VE11

date: Sun, 03 May 2026 23:01:20 GMT
via: 1.1 varnish
x-cache: MISS
x-cache-hits: 0
x-fastly-request-id: b572b0932e90cc3b4b77978c9fa1079a58eebf15
x-github-request-id: 3164:159B0A:2D85E8F:30E7714:69F7D3BF
x-served-by: cache-ewr-kewr1740033-EWR
x-timer: S1777849280.399770,VS0,VE11

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching