onlinecourses.com

https://onlinecourses.com· First analyzed 24 May 2026· Updated 24 May 2026

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onlinecourses.com

Mobile

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Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.164.206.100

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

AmazonS3

CDN

CloudFront

Nameservers

ns-1236.awsdns-26.org.ns-1635.awsdns-12.co.uk.ns-314.awsdns-39.com.ns-640.awsdns-16.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

841 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

609 KB

43 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Platform

AWS CloudFront

CDN

CloudFront

Technology Stack

6 Technologies Detected

Analytics

Libraries

Other

CSS Frameworks

Tag Managers

SEO Analysis

D58/100

Meta Tags12/15

Content12/12

Headings3/8

Technical12/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile2/4

Indexability3/3

onlinecourses.comonlinecourses.com

Online College Courses & Classes

Free online courses, videos and lectures from the world's leading universities like Yale, MIT, Stanford, and Harvard. Over 500 courses right at your fingertips.

Title Length32 chars

Recommended: 50-60 chars (~190px / 580px)

Description Length160 chars

Recommended: 120-160 chars

Issues (1)

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

11 issues found

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Crawlability

Sitemap

robots.txt

2 rules

Local SEO

Local Search Readiness

6/100

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

D42/100

Bot Access

19/25

Machine Read.

11/25

Schema Data

0/25

Citation

12/25

AI Bot Access

13/14 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:29%

Words:3,436

Token eff.:Good

Sections/1K:7.3

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary110w

Descriptive Headingsavg 2.4w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

73/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

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

1/15

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

2 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.

62/100

62 mg

CO₂e / view

608.7 KB

Page Weight

80%

Cleaner Than

New Visitor

70 mg

Returning (cached)

35 mg

Annual (10K/mo)

7.4 kg

Emission Segments

Data Center

3 mg

Network

18 mg

Device

40 mg

Resource Breakdown

JavaScript

162.0 KB

Images

116.2 KB

CSS

257.4 KB

HTML

73.1 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

WAF

158d

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

15.04.2026

Valid Until

29.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

onlinecourses.comwww.onlinecourses.com

SHA-256 Fingerprint

8F:B7:9E:E5:7B:DD:93:54:5F:08:EC:D5:F5:59:50:6E:1D:D8:8E:26...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

content-length

74581

content-type

text/html

date

Sun, 24 May 2026 03:32:20 GMT

etag

"128e72c682dbc569e3eb426ee0670082"

last-modified

Thu, 21 Nov 2024 20:21:03 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

onlinecourses-com.mail.protection.outlook.com

Domain Information

onlinecourses.com

Domain Age

25y 8m

Created

26.09.2000

Expires

26.09.2026

Last Updated

26.08.2025

Registrar

GoDaddy Corporate Domains, LLC

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

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.

58/100

Mobile Friendly3 breakpoints

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

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

ProximaNova-Bold + ProximaNova

WCAG AA

53/100

Readability

/30

21/30

16px · LH 1.38

Hierarchy

/20

5/20

WCAG

/25

18/25

4.9:1 min contrast

Performance

/25

9/25

3 fonts · 1 req

Heading Font

ProximaNova-Bold

Sans

Body Font

ProximaNova

Sans16px

Contrast Ratio

4.9:1

WCAG AA (≥4.5:1)

Reading Comfort

~38 CPL

Narrow lines

32px

19px

16px

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

⚠️ Tight line spacing (1.38). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 24/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.9:1).

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

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

Buy on MyFontsFlesch 24

Color Palette

7 unique colors

Light

#ffffff

Background· 80.19999999999999%

#b2513e

Primary· 3.7%

#658da4

Secondary· 2.7%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

sonic-ui.highereducation.com(7)googletagmanager.com(2)content.cmn.com(2)assets(2)ajax.googleapis.com(1)

Website Identity

onlinecourses.com

25 years old

Location detected: 🇫🇮 Finlandvia ip

GoDaddy Corporate Domains, LLC📧 Microsoft 365en

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Last analyzed: 24 May 2026 at 03:32

Historical Analysis & Change Tracking