railstutorial.org

https://railstutorial.org· First analyzed 09 May 2026· Updated 09 May 2026

Export

railstutorial.org

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

188.114.96.3

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

CloudFlare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dan.ns.cloudflare.com.dana.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.7 s10%

Speed Index

2.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

441 KB

150 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

14 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Crazy Egg

Payments

Libraries

CSS Frameworks

Icon Libraries

Fonts

Adobe Fonts (Typekit)

Tag Managers

Email Marketing

Advertising

CDN

SEO Analysis

C68/100

Meta Tags13/15

Content11/12

Headings8/8

Technical14/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

railstutorial.orgrailstutorial.org

Ruby on Rails Tutorial | Learn Enough to Be Dangerous

Learn how to develop and deploy real, industrial-strength web applications with Ruby on Rails. This new 8th edition has been fully updated for Rails 8.Learn ...

Description truncated.

Title Length53 chars

Recommended: 50-60 chars (~317px / 580px)

Description Length302 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (61/62) — critical for accessibility and SEO

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

1 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

18/100

Poor

5 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

F39/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

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

blockquotesnav

Text ratio:17%

Words:3,712

Token eff.:Poor Structure

Sections/1K:1.6

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary44w

Descriptive Headingsavg 5.2w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

43/100

Passed

Critical

Warnings

Images & Alt Text

3/20

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

5/15

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

7/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•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.

59/100

45 mg

CO₂e / view

440.9 KB

Page Weight

90%

Cleaner Than

New Visitor

51 mg

Returning (cached)

25 mg

Annual (10K/mo)

5.3 kg

Emission Segments

Data Center

2 mg

Network

13 mg

Device

29 mg

Resource Breakdown

JavaScript

414.0 KB

Images

1.1 KB

HTML

25.3 KB

Other

454 B

Green Hosting Verified

Cloudflare

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

5%Critical

Critical / Transactional

HTTPS

WAF

72d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

22.04.2026

Valid Until

21.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

railstutorial.org*.railstutorial.org

SHA-256 Fingerprint

2F:1D:01:E0:A6:15:42:F2:97:34:EB:DB:66:B3:3B:77:A2:13:C8:9F...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(max-age=0, private, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇦🇹 Vienna

9f8dc1564bac6cb4-VIE

content-encoding

zstd

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (7)

alt1.aspmx.l.google.com

aspmx5.googlemail.com

aspmx2.googlemail.com

aspmx.l.google.com

+3 more

Domain Information

railstutorial.org

Domain Age

18 years

Created

24.04.2008

Expires

24.04.2032

Last Updated

12.02.2023

Registrar

Sea Wasp, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

65/100

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...

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Typography & Readability

Open Sans

WCAG Partial

58/100

Readability

/30

20/30

16px · LH 1.70

Hierarchy

/20

14/20

2.2x ratio · ✓ H1→H6

WCAG

/25

14/25

1.94:1 min contrast

Performance

/25

10/25

4 fonts

Heading Font

Open Sans

Sans35px

Body Font

Open Sans

Sans16px

Contrast Ratio

1.94:1

10 issues

Reading Comfort

~39 CPL

Narrow lines

35px

24px

19px

32px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Hard to read: Flesch score 50/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.9:1).

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

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

AAdobe Fonts Buy on MyFontsFlesch 50

Color Palette

5 unique colors

Light

#644946

Primary· 81.19999999999999%

#9c897c

Secondary· 6.6%

#201111

Secondary· 5.3%

#74292b

Secondary· 3.7%

#382223

Secondary· 3%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(4)google-analytics.com(2)connect.facebook.net(2)js.braintreegateway.com(2)cdn.jsdelivr.net(2)

Website Identity

railstutorial.org

support@learnenough.com

1 (888) 979-2398

18 years old

Location detected: 🇨🇦 Canadavia ip

Sea Wasp, LLC📧 Google Workspace

Social Profiles

X (Twitter)YouTube GitHub

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Last analyzed: 09 May 2026 at 03:53

Historical Analysis & Change Tracking