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opencontent.org

https://opencontent.org· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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opencontent.org
Desktop screenshot of opencontent.org
Mobile screenshot of opencontent.org
Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

63.176.8.218

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS16509

Organization

AWS EC2 (eu-central-1)

Server

Netlify

Nameservers

dns1.p08.nsone.net.dns2.p08.nsone.net.dns3.p08.nsone.net.dns4.p08.nsone.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
456 ms10%
Speed Index
593 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
16 KB
4 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
Netlify

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Platforms

1
Netlify

SEO Analysis

C62/100
19
7
1
Meta Tags5/15
Content11/12
Headings3/8
Technical22/25
E-E-A-T3/7
Images0/7
Links2/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
O
opencontent.orgopencontent.org

Blogs | Improving Learning

Blogs - Improving Learning

Title Length26 chars

Recommended: 50-60 chars (~153px / 580px)

Description Length26 chars

Recommended: 120-160 chars

Issues (1)

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

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,397 URLs

robots.txt

Local SEO

Local Search Readiness

8/100
Poor
2 13 2

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

Sponsored

AI & LLM Readiness

D49/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
1/25
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
navheader/footer
Text ratio:44%
Words:1,488
Token eff.:Optimal
Sections/1K:6.7
Depth:2/5

Structured Data

1 JSON-LD
BreadcrumbList

Citation Readiness

Opening Summary93w
Descriptive Headingsavg 7.5w
Canonical URL
Open Graph1/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
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.
B
76/100
11
Passed
3
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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.
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.
79/100
A+
2 mg
CO₂e / view
15.9 KB
Page Weight
95%
Cleaner Than
New Visitor
2 mg
vs
Returning (cached)
<0.001 g
Annual (10K/mo)
192 g
Emission Segments
Data Center
<0.001 g
Network
<0.001 g
Device
1 mg
Resource Breakdown
Images
4.8 KB
CSS
4.4 KB
HTML
6.6 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
1 recommendation
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

76%Good
Static / Informational

HTTPS

No WAF

37d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.03.2026

Valid Until

06.06.2026

Subject Alternative Names (2)

*.opencontent.orgopencontent.org

SHA-256 Fingerprint

E6:B5:18:56:63:56:A3:E1:B1:21:18:58:D3:03:1B:D6:6D:DE:47:00...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
age
19553
cache-control
🟡 0s(public,max-age=0,must-revalidate)
cache-status
"Netlify Edge"; hit
content-length
401
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

opencontent.org

Domain Age
27y 10m

Created

17.06.1998

Expires

16.06.2026

Last Updated

09.03.2026

Registrar

GoDaddy.com, LLC

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.
C
60/100
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,shrink-to-fit=no
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG AA
70/100
Readability
/30
20/30

14px · LH 1.60

Hierarchy
/20
8/20
WCAG
/25
22/25

5.25:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

-apple-system

Sans

Body Font

-apple-system

Sans14px

Contrast Ratio

5.25:1

WCAG AA (≥4.5:1)

Reading Comfort

~41 CPL

Narrow lines
24px
h2
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.2:1).

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 54

Color Palette

4 unique colors
3.62:1 AA Large Light
#f5f5f5
Background· 92%
#808080
Other· 1.8%
#2e2e33
Primary· 0%

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

1 Resources

0
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

Website Identity

opencontent.org

27 years old
Location detected: 🇩🇪 Germanyvia ip
GoDaddy.com, LLCen

Social Profiles

GitHub

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Last analyzed: 30 Apr 2026 at 03:48

Historical Analysis & Change Tracking