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rubykaigi.org

https://rubykaigi.org· First analyzed 20 May 2026· Updated 20 May 2026
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rubykaigi.org
Desktop screenshot of rubykaigi.org
Mobile screenshot of rubykaigi.org
Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

13.33.235.120

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

CDN

CloudFront

Nameservers

dilbert.ns.cloudflare.com.jasmine.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
438 ms10%
Speed Index
569 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
234 KB
7 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

SEO Analysis

D53/100
13
9
1
Meta Tags8/15
Content6/12
Headings6/8
Technical11/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
R
rubykaigi.orgrubykaigi.org

RubyKaigi 2026 - RubyKaigi 2026

RubyKaigi 2026, #rubykaigi

Title Length31 chars

Recommended: 50-60 chars (~183px / 580px)

Description Length26 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (3/3) — critical for accessibility and SEO

10 issues found

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Local SEO

Local Search Readiness

14/100
Poor
4 11 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F36/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
9/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:1%
Words:92
Token eff.:Too Short
Sections/1K:20
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary452w
Descriptive Headingsavg 2w
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
81/100
11
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
18/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
84/100
A+
24 mg
CO₂e / view
233.8 KB
Page Weight
95%
Cleaner Than
New Visitor
27 mg
vs
Returning (cached)
14 mg
Annual (10K/mo)
2.8 kg
Emission Segments
Data Center
1 mg
Network
7 mg
Device
16 mg
Resource Breakdown
Images
160.1 KB
CSS
17.1 KB
Fonts
31.8 KB
HTML
24.7 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

86%Very Good
Static / Informational

HTTPS

WAF

292d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

08.02.2026

Valid Until

08.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

rubykaigi.org*.rubykaigi.org

SHA-256 Fingerprint

0C:7A:73:78:93:47:90:79:ED:B4:9C:88:B8:98:E5:CE:D4:AE:CC:ED...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
access-control-allow-origin
*
age
1286933
alt-svc
h3=":443"; ma=86400
cache-control
🟡 0s(public, max-age=0, s-maxage=31536000)
content-encoding
📦 Gzip(gzip)
Good Warning Issue

Email Infrastructure

Google Workspace

Score

70

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

aspmx3.googlemail.com
aspmx.l.google.com
aspmx2.googlemail.com
alt1.aspmx.l.google.com

+1 more

Domain Information

rubykaigi.org

Domain Age
18y 7m

Created

15.10.2007

Expires

15.10.2026

Last Updated

20.09.2025

Registrar

eNom, LLC

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
59/100
Mobile Friendly
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Outfit

WCAG Fail
60/100
Readability
/30
23/30

20px · LH 1.60

Hierarchy
/20
10/20

0.8x ratio

WCAG
/25
12/25

1:1 min contrast

Performance
/25
15/25

1 font · 1 req

Heading Font

Outfit

Sans16px

Body Font

Outfit

Sans20px

Contrast Ratio

1:1

32 issues

Reading Comfort

~35 CPL

Narrow lines
16px
h1
24px
h2
20px
p
Perfect Fifth
Scale

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 19/100. Consider shorter sentences and simpler words.

❌ Low contrast: 32 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

Buy on MyFontsFlesch 19

Color Palette

10 unique colors
Light
#5b281f
Secondary· 32.8%
#461d18
Secondary· 12.6%
#8b4f44
Secondary· 8.5%
#fefdfd
Primary· 7.7%
#b99d97
Secondary· 6.4%
#7e4036
Primary· 5.8%
#e1d4d0
Secondary· 5%
#966960
Secondary· 4.8%

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Scripts & Styles

1 Resources

0
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

Website Identity

rubykaigi.org

18 years old
Location detected: 🇺🇸 United Statesvia ip
eNom, LLC📧 Google Workspaceen

Social Profiles

X (Twitter)

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Last analyzed: 20 May 2026 at 20:10

Historical Analysis & Change Tracking