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d2l.ai

https://d2l.ai· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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d2l.ai
Desktop screenshot of d2l.ai
Mobile screenshot of d2l.ai
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

18.165.140.30

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

AmazonS3

CDN

CloudFront

Nameservers

ns-1901.awsdns-45.co.uk.ns-6.awsdns-00.com.ns-704.awsdns-24.net.ns-1236.awsdns-26.org.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
830 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
14.6 MB
69 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Technology Stack

7 Technologies Detected

Libraries

2
jQuery
Underscore.js

Icon Libraries

2
Font AwesomeMaterial Icons

Frameworks

1
Angular

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

SEO Analysis

D58/100
15
7
2
Meta Tags7/15
Content11/12
Headings8/8
Technical11/21
E-E-A-T3/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
D
d2l.aid2l.ai

Dive into Deep Learning — Dive into Deep Learning 1.0.3 documentation

No description available for this page.

Title Length69 chars

Recommended: 50-60 chars (~408px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (35/38) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Local SEO

Local Search Readiness

4/100
Poor
2 14 2

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

Sponsored

AI & LLM Readiness

D41/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
0/25
Citation
8/25

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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
code blocksnav
Text ratio:16%
Words:4,450
Token eff.:Poor Structure
Sections/1K:1.6
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary23w
Descriptive Headingsavg 3.4w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

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.
C
67/100
11
Passed
2
Critical
0
Warnings
Images & Alt Text
5/20
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
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.
23/100
F
1.51 g
CO₂e / view
14.6 MB
Page Weight
5%
Cleaner Than
New Visitor
1.73 g
vs
Returning (cached)
863 mg
Annual (10K/mo)
181.2 kg
Emission Segments
Data Center
74 mg
Network
444 mg
Device
992 mg
Resource Breakdown
JavaScript
104.1 KB
Images
14.0 MB
CSS
321.2 KB
HTML
184.4 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

26%Critical
Interactive

HTTPS

WAF

61d

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

02.06.2025

Valid Until

30.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

d2l.ai*.d2l.ai

SHA-256 Fingerprint

99:9B:EE:7B:ED:67:E6:BD:EE:C3:95:C6:4F:69:88:B9:E1:4C:6D:8D...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

age
3730
content-length
188475
content-type
text/html
date
Thu, 30 Apr 2026 19:20:16 GMT
etag
"ed1453444b46ec7508534cefe8eadeb7"
last-modified
Fri, 18 Aug 2023 23:29:03 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

d2l.ai

Domain Age
7y 4m

Created

26.12.2018

Expires

26.12.2030

Last Updated

12.07.2022

Registrar

NameCheap, Inc.

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.
C
69/100
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.
Viewport
width=device-width, initial-scale=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Roboto

WCAG Partial
63/100
Readability
/30
21/30

16px · LH 1.50

Hierarchy
/20
10/20

2x ratio

WCAG
/25
17/25

1:1 min contrast

Performance
/25
15/25

System fonts

Heading Font

Roboto

Sans32px

Body Font

Roboto

Sans16px

Contrast Ratio

1:1

8 issues

Reading Comfort

~39 CPL

Narrow lines
32px
h1
34px
h2
24px
h3
20px
h4
16px
p

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

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

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

Flesch 0

Color Palette

6 unique colors
Light
#fafafa
Background· 76.50000000000001%
#58a2da
Accent· 6.8%
#2196f3
Primary· 6.6%
#466166
Secondary· 3.5%
#70b4e6
Accent· 1.9%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Social Media

1
Twitter/X WidgetsFree

Social widgets and sharing tools

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

19 Resources

12
Scripts
7
Styles
3
Async
1
Defer

Top Script Sources

_static(8)platform.twitter.com(2)google-analytics.com(1)buttons.github.io(1)

Website Identity

d2l.ai

7 years old
Location detected: 🇫🇮 Finlandvia ip
NameCheap, Inc.en

Social Profiles

LinkedInGitHub

Sponsored

Last analyzed: 30 Apr 2026 at 20:04

Historical Analysis & Change Tracking