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ef.com.co

https://ef.com.co· First analyzed 04 Jun 2026· Updated 04 Jun 2026
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ef.com.co
Desktop screenshot of ef.com.co
Mobile screenshot of ef.com.co
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.10.139

Site Location

🇨🇴 Colombiavia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

anirban.ns.cloudflare.com.pam.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
325 ms10%
Speed Index
422 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
39 KB
52 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Decoupled
Frontend
Framework
Next.js
Styling
Tailwind CSS
API
Data Source
Headless CMS
Storyblok
Infrastructure
Platform
AWS CloudFront
CDN
Cloudflare

Detected API Sources

https://a.storyblok.com/f/3411...

Technology Stack

4 Technologies Detected

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

CDN

1
Cloudflare

SEO Analysis

B74/100
21
5
2
Meta Tags13/15
Content10/12
Headings3/8
Technical23/25
E-E-A-T2/7
Images2/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
E
ef.com.coef.com.co

EF - Idiomas. Educación. Viajes. | EF Colombia

Líder mundial en intercambios estudiantiles, cursos de inglés y otros idiomas, y programas académicos en el exterior. Elige entre más de 50 escuelas alrededo...

Description truncated.
Title Length46 chars

Recommended: 50-60 chars (~268px / 580px)

Description Length169 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (9/12) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

15 rules

Sitemap reference found

Local SEO

Local Search Readiness

17/100
Poor
5 11 1

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

D47/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
3/25
Citation
14/25

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
nav
Text ratio:2%
Words:721
Token eff.:Optimal
Sections/1K:5.5
Depth:1/5

Structured Data

Microdata
Organization×1.1microdataWebSitemicrodata

Citation Readiness

Opening Summary19w
Descriptive Headingsavg 5w
Canonical URL
Open Graph3/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
B
78/100
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
6/15
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.
84/100
A+
4 mg
CO₂e / view
38.8 KB
Page Weight
95%
Cleaner Than
New Visitor
5 mg
vs
Returning (cached)
2 mg
Annual (10K/mo)
468 g
Emission Segments
Data Center
<0.001 g
Network
1 mg
Device
3 mg
Resource Breakdown
HTML
38.8 KB
Green Hosting Verified
Cloudflare
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

56%Poor
Interactive

HTTPS

WAF

61d

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

07.05.2026

Valid Until

05.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.ef.com.co

SHA-256 Fingerprint

4C:8D:1F:97:71:7E:D7:40:90:6E:19:0A:79:36:E1:1F:B4:AB:FC:BA...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age
1363
alt-svc
h3=":443"; ma=86400
cache-control
🟡 1200s(max-age=1200)
cf-cache-status
DYNAMIC
cf-placement
remote-AMS
cf-ray🇮🇹 Milan
a0691370ee84edca-MXP
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

ef-com-co.mail.protection.outlook.com

Domain Information

ef.com.co

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Privacy policy page linked
Data Protection Officer mentioned

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.
B
70/100
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica

WCAG AAA
67/100
Readability
/30
20/30

16px · LH --

Hierarchy
/20
8/20
WCAG
/25
23/25

9.4:1 min contrast

Performance
/25
16/25

2 fonts · 5 req

Heading Font

Helvetica

Sans

Body Font

Helvetica

Sans16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~41 CPL

Narrow lines
24px
h2
16px
h4
16px
p

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

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

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

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

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

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFontsFlesch 0

Color Palette

7 unique colors
Light
#ffffff
Background· 97%
#9193d7
Secondary· 1.1%
#acacdc
Secondary· 0.5%
#c2c2e4
Secondary· 0.4%
#d1d2e9
Secondary· 0.4%
#e9ebf4
Primary· 0.4%
#6e6ccf
Accent· 0.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

21 Resources

20
Scripts
1
Styles
1
Async
17
Defer

Top Script Sources

local(20)

Website Identity

ef.com.co

6015802743
Location detected: 🇨🇴 Colombiavia tld
📧 Microsoft 365es-CO

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Last analyzed: 04 Jun 2026 at 18:42

Historical Analysis & Change Tracking