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xkcd.com

xkcd: Arthurian Connector

Last scanned Jul 21, 2026, 11:40 AM · 1 view

74

Overall score

Fair

Top issues to fix

12 issues found · 5 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • 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 X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+6 more issues — details in the sections below.

Summary

This website uses Nginx hosted on Fastly behind Fastly CDN. SEO is fair (60/100) and accessibility is good (75/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

60

SEO

5 issue(s) found

100

Performance

613 ms

65

Security

HTTPS & header checks

75

Accessibility

3 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

X (Twitter)FacebookInstagramX (Twitter)

Meta tags

Title
xkcd: Arthurian Connector
Description
Canonical
Language
Charset
Viewport
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Arthurian Connector
og:description
—
og:type
—
og:url
https://xkcd.com/3274/

Twitter Card

twitter:card
summary_large_image
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Nginx

Hosting & CDN

Hosting provider
Fastly
CDN provider
Fastly
IP address
151.101.128.67
ASN
AS54113 (FASTLY - Fastly, Inc., US)

DNS records

TypeValue
A
  • 151.101.128.67
  • 151.101.64.67
  • 151.101.0.67
  • 151.101.192.67
AAAA
  • 2a04:4e42::67
  • 2a04:4e42:200::67
  • 2a04:4e42:600::67
  • 2a04:4e42:400::67
MX
  • aspmx3.googlemail.com
  • aspmx4.googlemail.com
  • aspmx2.googlemail.com
  • aspmx5.googlemail.com
  • aspmx.l.google.com
  • alt1.aspmx.l.google.com
  • alt2.aspmx.l.google.com
TXT
  • v=spf1 include:_spf.google.com include:mailgun.org ~all
NS
  • ns-cloud-d4.googledomains.com
  • ns-cloud-d2.googledomains.com
  • ns-cloud-d3.googledomains.com
  • ns-cloud-d1.googledomains.com
CAA
  • 128 issuewild "globalsign.com"
  • 128 issue "globalsign.com"
  • 128 issue "letsencrypt.org"
CNAME—
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.2
Issuer
GlobalSign nv-sa
Subject
xkcd.com
Valid from
Dec 8, 2025
Valid to
Jan 9, 2027
Days until expiry
172
SAN domains
xkcd.com

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

16 internal · 21 external · 3 broken

Images

4 total · 0 missing alt

Scripts / Styles

0 scripts · 1 stylesheets

JS / CSS size

0 B · 3.5 KB

Page size

6.9 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
2
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing meta description
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found
  • Missing <html lang> attribute
  • Missing viewport meta tag

Scan details

Requested URL
https://xkcd.com
Final URL
https://xkcd.com
HTTP status
200
HTTP version
HTTP/1.1
Response time
613 ms
HTML size
6.9 KB
Redirect chain
https://xkcd.com

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Frequently asked questions

What technology does xkcd.com use?
xkcd.com is built with Nginx.
Is xkcd.com secure (HTTPS)?
Yes. xkcd.com uses TLS 1.2 with a certificate issued by GlobalSign nv-sa, valid until Jan 9, 2027.
Who hosts xkcd.com?
xkcd.com is hosted on Fastly, behind Fastly CDN.
What is xkcd.com's SEO score?
xkcd.com scored 60/100 for SEO in the latest analysis (fair).
What is xkcd.com's overall website score?
xkcd.com has an overall SiteGraph score of 74/100, combining SEO, performance, security, and accessibility.