What technology does zx2c4.com use?

We did not detect any specific technologies for zx2c4.com in the latest scan.

Is zx2c4.com secure (HTTPS)?

Yes. zx2c4.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 20, 2026.

Hosting provider information for zx2c4.com is not available yet.

What is zx2c4.com's SEO score?

zx2c4.com scored 70/100 for SEO in the latest analysis (fair).

What is zx2c4.com's overall website score?

zx2c4.com has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.

Has zx2c4.com's score changed over time?

zx2c4.com's overall score has declined by 1 point (from 83 to 82) since Jul 25, 2026.

zx2c4.com

ZX2C4

Last scanned Aug 1, 2026, 10:00 PM · 7 views

Overall score

Great

Summary

The portal for geek projects of Jason A. SEO is fair (70/100) and accessibility is fair (65/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing canonical link.

The portal for geek projects of Jason A. Donenfeld, also known as ZX2C4.

Top issues to fix

9 issues found · 3 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEO
Add og:title/og:description/og:image so shared links render a proper preview card.

+3 more issues — details in the sections below.

SEO

5 issue(s) found

100

Performance

248 ms

Security

HTTPS & header checks

Accessibility

2 issue(s) found

Score history

-1 overall since Jul 25, 2026

Overall: 82
SEO: 70
Security: 90
Performance: 100
Accessibility: 65

Organization

Company details published in this site's own structured data.

The portal for geek projects of Jason A. Donenfeld, also known as ZX2C4.

Meta tags

Title: ZX2C4
Description: The portal for geek projects of Jason A. Donenfeld, also known as ZX2C4.
Canonical
Language: en
Charset: utf-8
Viewport
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: www.zx2c4.com
Valid from: Jun 22, 2026
Valid to: Sep 20, 2026
Days until expiry: 49
SAN domains: www.zx2c4.com

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 0 · H3 0

Links

1 internal · 3 external · 4 broken

Images

1 total · 1 missing alt

Scripts / Styles

2 scripts · 1 stylesheets

JS / CSS size

0 B · 0 B

Page size

1.9 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Missing canonical link
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://zx2c4.com
Final URL: https://www.zx2c4.com/
HTTP status: 200
HTTP version: HTTP/2
Response time: 248 ms
HTML size: 1.9 KB
Redirect chain: https://zx2c4.com → https://www.zx2c4.com/

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Frequently asked questions

What technology does zx2c4.com use?: We did not detect any specific technologies for zx2c4.com in the latest scan.
Is zx2c4.com secure (HTTPS)?: Yes. zx2c4.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 20, 2026.
Who hosts zx2c4.com?: Hosting provider information for zx2c4.com is not available yet.
What is zx2c4.com's SEO score?: zx2c4.com scored 70/100 for SEO in the latest analysis (fair).
What is zx2c4.com's overall website score?: zx2c4.com has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
Has zx2c4.com's score changed over time?: zx2c4.com's overall score has declined by 1 point (from 83 to 82) since Jul 25, 2026.