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zearn.org

https://zearn.org· First analyzed 18 May 2026· Updated 18 May 2026
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zearn.org
Desktop screenshot of zearn.org
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Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

13.248.213.92

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Montreal, Canada

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

Heroku

Nameservers

ns1.dnsimple.com.ns2.dnsimple.com.ns3.dnsimple.com.ns4.dnsimple.com.

Performance

100
83 KB
64 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Amazon Web Services (AWS)

Technology Stack

3 Technologies Detected

Icon Libraries

1
Font Awesome

Analytics

1
Segment

Platforms

1
Heroku

SEO Analysis

D40/100
12
6
2
Meta Tags9/15
Content0/12
Headings0/8
Technical15/25
E-E-A-T0/7
Images0/7
Links0/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
Z
zearn.orgzearn.org

Login | Zearn Math

Learning with Zearn helps math make sense. Students explore math through pictures, visual models, and real-life examples. Log in to your Zearn account.

Title Length18 chars

Recommended: 50-60 chars (~110px / 580px)

Description Length151 chars

Recommended: 120-160 chars

Issues (2)

  • • Very thin content (4 words). Search engines need substantial content for ranking.
  • • Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

5 URLs

robots.txt

2 rules

Allows all crawlers

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

F26/100
Bot Access
20/25
Machine Read.
1/25
Schema Data
0/25
Citation
5/25

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
Text ratio:0%
Words:0
Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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.
C
66/100
8
Passed
4
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
6/20
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
1/15
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.
64/100
A+
8 mg
CO₂e / view
82.8 KB
Page Weight
95%
Cleaner Than
New Visitor
10 mg
vs
Returning (cached)
5 mg
Annual (10K/mo)
1.0 kg
Emission Segments
Data Center
<0.001 g
Network
3 mg
Device
6 mg
Resource Breakdown
HTML
82.8 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

81%Very Good
Interactive

HTTPS

No WAF

175d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

18.12.2025

Valid Until

09.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

www.zearn.orgwebassets.zearn.orgzearn.org

SHA-256 Fingerprint

91:02:2B:2D:1E:BE:D8:75:37:23:3F:36:54:3F:D4:7C:FB:B3:CF:F0...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟡 0s(max-age=0, private, must-revalidate)
content-length
84533
content-security-policy
default-src 'self' https:; script-src 'self' https: 'unsafe-...
content-type
text/html; charset=utf-8
date
Mon, 18 May 2026 16:16:12 GMT
etag
W/"3082ec9e55afad8976ffa6506647a149"
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

95

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

zearn-org.mail.protection.outlook.com

Domain Information

zearn.org

Domain Age
14y 9m

Created

30.07.2011

Expires

30.07.2026

Last Updated

03.08.2025

Registrar

Tucows Domains Inc.

DNSSEC
Not Enabled

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
57/100
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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Verdana

62/100
Readability
/30
21/30

16px · LH --

Hierarchy
/20
8/20
WCAG
/25
19/25
Performance
/25
14/25

2 fonts

Heading Font

Verdana

Body Font

Verdana

Sans16px

Contrast Ratio

--

Reading Comfort

Single Family

left aligned

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

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

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

Buy on MyFonts

Color Palette

1 unique colors
Light
#ebebeb
Background· 100%

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

17 Resources

7
Scripts
10
Styles
1
Async
0
Defer

Top Script Sources

d33atdio81inpg.cloudfront.net(6)webassets.zearn.org(1)

Website Identity

zearn.org

14 years old
Location detected: 🇨🇦 Canadavia ip
Tucows Domains Inc.📧 Microsoft 365en-US

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Last analyzed: 18 May 2026 at 16:16

Historical Analysis & Change Tracking