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crystal-lang.org

https://crystal-lang.org· First analyzed 07 May 2026· Updated 07 May 2026
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crystal-lang.org
Desktop screenshot of crystal-lang.org
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Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

108.156.22.44

Site Location

🇮🇪 Irelandvia ip

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

AmazonS3

CDN

CloudFront

Nameservers

ns-1799.awsdns-32.co.uk.ns-289.awsdns-36.com.ns-960.awsdns-56.net.ns-1135.awsdns-13.org.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
817 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.4 MB
28 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Frontend
Framework
Jekyllv4.4.1
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Technology Stack

4 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

Email Marketing

1
Mailchimp

SEO Analysis

B74/100
20
5
1
Meta Tags10/15
Content11/12
Headings8/8
Technical16/21
E-E-A-T5/7
Images1/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
C
crystal-lang.orgcrystal-lang.org

The Crystal Programming Language

Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types a...

Description truncated.
Title Length32 chars

Recommended: 50-60 chars (~199px / 580px)

Description Length209 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (12/13) — critical for accessibility and SEO

6 issues found

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Local SEO

Local Search Readiness

9/100
Poor
3 13 1

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

D56/100
Bot Access
20/25
Machine Read.
15/25
Schema Data
6/25
Citation
15/25

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 blocksnavheader/footer
Text ratio:12%
Words:940
Token eff.:Optimal
Sections/1K:14.9
Depth:3/5

Structured Data

1 JSON-LD
Organization×1.1WebSite
sameAs entity links

Citation Readiness

Opening Summary58w
Descriptive Headingsavg 1.5w
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (6)
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
83/100
12
Passed
1
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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.
75/100
B
140 mg
CO₂e / view
1.4 MB
Page Weight
60%
Cleaner Than
New Visitor
160 mg
vs
Returning (cached)
80 mg
Annual (10K/mo)
16.8 kg
Emission Segments
Data Center
7 mg
Network
41 mg
Device
92 mg
Resource Breakdown
JavaScript
4.2 KB
Images
1.2 MB
CSS
78.5 KB
Fonts
47.2 KB
HTML
13.2 KB
Other
722 B
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
2 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

26%Critical
Interactive

HTTPS

WAF

188d

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

Valid From

14.10.2025

Valid Until

11.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

crystal-lang.org

SHA-256 Fingerprint

03:13:87:51:8C:D5:A6:44:28:2A:C3:75:63:A1:65:46:B7:F4:84:02...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-type
text/html
date
Thu, 07 May 2026 19:20:36 GMT
etag
W/"21ab4362a99c691f573699dbddb0ddb3"
last-modified
Tue, 05 May 2026 13:39:05 GMT
server
AmazonS3
Good Warning Issue

Email Infrastructure

Amazon SES

Score

20

SPF
DKIM
DMARC

MX Records (1)

inbound-smtp.us-east-1.amazonaws.com

Domain Information

crystal-lang.org

Domain Age
12y 10m

Created

10.07.2013

Expires

10.07.2026

Last Updated

10.06.2025

Registrar

Gandi SAS

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
53/100
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=1.0
3 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Roboto

WCAG Partial
77/100
Readability
/30
23/30

17px · LH 1.50

Hierarchy
/20
17/20

2.71x ratio · ✓ H1→H6

WCAG
/25
20/25

4.04:1 min contrast

Performance
/25
17/25

System fonts

Heading Font

Roboto

Sans47px

Body Font

Roboto

Sans17px

Contrast Ratio

4.04:1

Below AA

Reading Comfort

~45 CPL

Narrow lines
47px
h1
38px
h2
30px
h3
17px
p

✅ Excellent readability: 17px body text is ideal for all devices.

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

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 0 elements below WCAG AA threshold (min 4.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

Fluid Type (rem)Flesch 34

Color Palette

3 unique colors
6.5:1 AA Dark
#080808
Background· 49.7%
#929392
Other· 4.8%

Business & Marketing Stack

2 Tools Detected

Advanced

Marketing Automation

1
MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

3 Resources

2
Scripts
1
Styles
1
Async
1
Defer

Top Script Sources

local(1)googletagmanager.com(1)

Website Identity

Crystal Language

Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types are resolved by an advanced type inference algorithm.

crystal@manas.tech
crystal-lang.org/
12 years old
Location detected: 🇮🇪 Irelandvia ip
Gandi SAS📧 Amazon SESen

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Last analyzed: 07 May 2026 at 19:20

Historical Analysis & Change Tracking