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jruby.org

https://jruby.org· First analyzed 03 May 2026· Updated 03 May 2026
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jruby.org
Desktop screenshot of jruby.org
Mobile screenshot of jruby.org
Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

3.33.251.168

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Montreal, Canada

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

GitHub.com

CDN

Fastly

Nameservers

ns26.domaincontrol.com.ns25.domaincontrol.com.

Performance

93

Core Web Vitals

Weight

First Contentful Paint
1.3 s10%
Speed Index
1.7 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
276 KB
43 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

2 Technologies Detected

Libraries

1
jQuery

Analytics

1
Google Analytics

SEO Analysis

D51/100
14
7
2
Meta Tags8/15
Content9/12
Headings6/8
Technical10/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
J
jruby.orgjruby.org

Home — JRuby.org

JRuby is a high performance, stable, fully threaded Java implementation of the Ruby programming language.

Title Length16 chars

Recommended: 50-60 chars (~99px / 580px)

Description Length105 chars

Recommended: 120-160 chars

Issues (2)

  • • Most images missing alt text (9/11) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

9 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

0 rules

Local SEO

Local Search Readiness

3/100
Poor
1 14 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

F33/100
Bot Access
20/25
Machine Read.
6/25
Schema Data
0/25
Citation
7/25

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
code blocks
Text ratio:10%
Words:200
Token eff.:Too Short
Sections/1K:60
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary12w
Descriptive Headingsavg 3w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
D
59/100
9
Passed
5
Critical
0
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
12/20
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
3/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
68/100
A+
28 mg
CO₂e / view
276.5 KB
Page Weight
90%
Cleaner Than
New Visitor
32 mg
vs
Returning (cached)
16 mg
Annual (10K/mo)
3.3 kg
Emission Segments
Data Center
1 mg
Network
8 mg
Device
18 mg
Resource Breakdown
JavaScript
27.0 KB
Images
164.7 KB
CSS
81.2 KB
HTML
3.6 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

84d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.04.2026

Valid Until

26.07.2026

Subject Alternative Names (1)

www.jruby.org

SHA-256 Fingerprint

A2:10:31:98:A4:00:8E:D6:93:AE:56:7E:32:41:E9:35:6F:50:49:54...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
access-control-allow-origin
*
age
0
cache-control
🟡 600s(max-age=600)
content-encoding
📦 Gzip(gzip)
content-length
3397
Good Warning Issue

Email Infrastructure

Google Workspace

Score

20

SPF
DKIM
DMARC

MX Records (5)

alt1.aspmx.l.google.com
alt2.aspmx.l.google.com
aspmx.l.google.com
alt4.aspmx.l.googlemail.com

+1 more

Domain Information

jruby.org

Domain Age
20y 1m

Created

29.03.2006

Expires

29.03.2030

Last Updated

10.06.2024

Registrar

GoDaddy.com, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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
46/100
Not Mobile Friendly1 breakpoint
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.
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

myriad-pro-2

WCAG Partial
61/100
Readability
/30
19/30

13px · LH 1.50

Hierarchy
/20
12/20

2x ratio

WCAG
/25
16/25

1:1 min contrast

Performance
/25
14/25

2 fonts

Heading Font

myriad-pro-2

Sans25px

Body Font

myriad-pro-2

Sans13px

Contrast Ratio

1:1

32 issues

Reading Comfort

~58 CPL

Optimal (45–75)
25px
h1
19px
h2
17px
h3
14px
h4
13px
p

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~58 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 44/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 32 elements below WCAG AA threshold (min 1.0:1).

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

Buy on MyFontsFlesch 45

Color Palette

8 unique colors
18.93:1 AAA Light
#f3f3f3
Text· 22.2%
#000000
Text· 14%
#8f0202
Primary· 21.7%
#aa0202
Accent· 15.1%
#6f3535
Secondary· 3.2%
#510404
Accent· 0.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

12 Resources

8
Scripts
4
Styles
1
Async
0
Defer

Top Script Sources

local(5)ssl.google-analytics.com(1)use.typekit.com(1)cdn.jsdelivr.net(1)

Website Identity

jruby.org

20 years old
Location detected: 🇨🇦 Canadavia ip
GoDaddy.com, LLC📧 Google Workspaceen

Social Profiles

GitHub

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Last analyzed: 03 May 2026 at 05:13

Historical Analysis & Change Tracking