k12.com.cn

https://k12.com.cn· First analyzed 14 May 2026· Updated 14 May 2026

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k12.com.cn

$Desktop screenshot of k12.com.cn$

Mobile

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

121.40.60.40

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Alibaba.com LLC

Server

Nginx

Nameservers

vip2.alidns.com.vip1.alidns.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.1 s10%

Speed Index

2.7 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5 KB

40 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Alibaba Cloud

Technology Stack

5 Technologies Detected

Libraries

CSS Frameworks

Web Servers

SEO Analysis

F37/100

Meta Tags5/15

Content7/12

Headings0/8

Technical10/25

E-E-A-T3/7

Images1/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

k12.com.cnk12.com.cn

K12教育空间

Title Length7 chars

Recommended: 50-60 chars (~41px / 580px)

Description Length7 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (23/23) — critical for accessibility and SEO

16 issues found

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Crawlability

Sitemap

robots.txt

26 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.

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AI & LLM Readiness

F22/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

1/25

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:3%

Words:75

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

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.

48/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

3/20

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.

4 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.

57/100

A+

<0.001 g

CO₂e / view

4.9 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

72 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

4.9 KB

Green Hosting Not Verified

Alibaba Cloud

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

86%Very Good

Static / Informational

HTTPS

No WAF

39d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

24.03.2026

Valid Until

22.06.2026

Subject Alternative Names (10)

k12.com.cnn1.k12img.comn2.k12img.comn3.k12img.comn4.k12img.comn5.k12img.comn6.k12img.comspace.k12.com.cn+2 more

SHA-256 Fingerprint

0D:A5:AA:DF:58:B4:80:3A:14:91:85:EB:78:64:9B:BF:C4:09:2F:DF...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Thu, 14 May 2026 11:47:30 GMT

etag

W/"6a05ac5d-483a"

last-modified

Thu, 14 May 2026 11:05:01 GMT

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mxbiz1.qq.com

mxbiz2.qq.com

Domain Information

k12.com.cn

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.

54/100

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=1.0

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Verdana

WCAG Partial

52/100

Readability

/30

14/30

12px · LH 1.67

Hierarchy

/20

10/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Verdana

Body Font

Verdana

Sans12px

Contrast Ratio

1:1

22 issues

Reading Comfort

Single Family

left aligned

12px

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Partial contrast: 22 elements below WCAG AA threshold (min 1.0:1).

✅ Lean font stack: 1 font families keeps load times fast.

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

Buy on MyFonts

Color Palette

11 unique colors

6.97:1 AA Light

#ffffff

Background· 58.6%

#5a595b

Other· 7%

#f3f1ee

Secondary· 8.3%

#77c7fa

Accent· 6.5%

#275fa2

Primary· 3.4%

#afd5ea

Accent· 3%

#b1ab90

Secondary· 2.9%

#57a8db

Primary· 2.8%

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Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

t.k12.com.cn(7)ssl.k12.com.cn(1)

Website Identity

k12.com.cn

Location detected: 🇨🇳 Chinavia tld

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Last analyzed: 14 May 2026 at 11:48

Historical Analysis & Change Tracking