katacoda.com

https://katacoda.com· First analyzed 12 May 2026· Updated 12 May 2026

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katacoda.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.22.208

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

angela.ns.cloudflare.com.james.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

663 ms10%

Speed Index

862 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

263 KB

31 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

11 Technologies Detected

Libraries

CSS Frameworks

Analytics

Icon Libraries

Fonts

Tag Managers

CDN

Customer Support

SEO Analysis

D50/100

Meta Tags10/15

Content4/12

Headings3/8

Technical11/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social1/5

Freshness0/4

Mobile4/4

Indexability3/3

katacoda.comkatacoda.com

Katacoda - Interactive Learning Platform for Software Engineers

Learn the latest technologies with our hands-on labs

Title Length63 chars

Recommended: 50-60 chars (~385px / 580px)

Description Length52 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

10 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Local SEO

Local Search Readiness

0/100

Poor

15 2

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

Sponsored

AI & LLM Readiness

F13/100

Bot Access

3/25

Machine Read.

4/25

Schema Data

0/25

Citation

6/25

AI Bot Access

0/14 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:5%

Words:67

Token eff.:Too Short

Sections/1K:10

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 27w

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

77/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

10/20

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

13/15

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.

3 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.

63/100

A+

27 mg

CO₂e / view

263.5 KB

Page Weight

95%

Cleaner Than

New Visitor

30 mg

Returning (cached)

15 mg

Annual (10K/mo)

3.2 kg

Emission Segments

Data Center

1 mg

Network

8 mg

Device

18 mg

Resource Breakdown

JavaScript

178.3 KB

Images

1.5 KB

CSS

76.9 KB

Fonts

3.8 KB

HTML

3.0 KB

Green Hosting Verified

Cloudflare

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Interactive

HTTPS

WAF

86d

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

09.05.2026

Valid Until

07.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

katacoda.com*.katacoda.com

SHA-256 Fingerprint

B3:BB:89:7C:6A:21:E7:4E:61:3E:D0:77:D1:EE:8D:11:F1:71:63:C6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-headers

Origin, X-Requested-With, Content-Type, Accept

access-control-allow-origin

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray🇫🇷 Paris

9fa82d5c289e147e-CDG

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

aspmx.l.google.com

alt4.aspmx.l.google.com

alt3.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

katacoda.com

Domain Age

10y 7m

Created

02.10.2015

Expires

02.10.2026

Last Updated

01.10.2025

Registrar

GoDaddy.com, 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.

62/100

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,user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Helvetica

WCAG Partial

54/100

Readability

/30

14/30

15px · LH 3.73

Hierarchy

/20

7/20

WCAG

/25

18/25

1:1 min contrast

Performance

/25

15/25

2 fonts · 3 req

Heading Font

Helvetica

Sans

Body Font

Helvetica

Sans15px

Contrast Ratio

1:1

1 issue

Reading Comfort

Single Font Family

left aligned

45px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Wide line spacing (3.73). 1.4–1.6 is optimal for body text.

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

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

✅ Lean font stack: 2 font families keeps load times fast.

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

GGoogle Fonts Buy on MyFonts

Color Palette

9 unique colors

Light

#fefefe

Primary· 8.8%

#e6ebee

Background· 43.699999999999996%

#006fd8

Accent· 11.100000000000001%

#00bb97

Accent· 7.5%

#0095b7

Accent· 7.3%

#2e334c

Secondary· 7.2%

#0647d8

Accent· 6%

#02a7aa

Accent· 5.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)google-analytics.com(1)googletagmanager.com(1)openfpcdn.io(1)

Website Identity

katacoda.com

10 years old

Location detected: 🇨🇦 Canadavia ip

GoDaddy.com, LLC📧 Google Workspace

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Last analyzed: 12 May 2026 at 08:50

Historical Analysis & Change Tracking