w3cschool.cn
w3cschool官网 - 1000多本编程教程免费学
Last scanned Jul 27, 2026, 4:43 PM
Overall score
Great
Summary
w3cschool启用中文品牌名--编程狮，是一个专业的W3C前端开发及编程入门学习平台，提供包括HTML,CSS,Javascript,jQuery,C,PHP,Java,Python,Sql,Mysql等编程语言和开源技术的在线教程��… This website uses PHP hosted on ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN. SEO is good (75/100) and accessibility is excellent (95/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Meta description longer than 160 characters.
w3cschool启用中文品牌名--编程狮，是一个专业的W3C前端开发及编程入门学习平台，提供包括HTML,CSS,Javascript,jQuery,C,PHP,Java,Python,Sql,Mysql等编程语言和开源技术的在线教程及使用手册，是类国外w3schools的W3C学习社区及菜鸟编程平台。
- China
- Hosted on ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN
Top issues to fix
11 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
7 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
+5 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
683 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
w3cschool启用中文品牌名--编程狮，是一个专业的W3C前端开发及编程入门学习平台，提供包括HTML,CSS,Javascript,jQuery,C,PHP,Java,Python,Sql,Mysql等编程语言和开源技术的在线教程及使用手册，是类国外w3schools的W3C学习社区及菜鸟编程平台。
Contact
Email, phone, and address published on this site's own pages.
- jubao@eeedong.com
Meta tags
- Title
- w3cschool官网 - 1000多本编程教程免费学
- Description
- w3cschool启用中文品牌名--编程狮，是一个专业的W3C前端开发及编程入门学习平台，提供包括HTML,CSS,Javascript,jQuery,C,PHP,Java,Python,Sql,Mysql等编程语言和开源技术的在线教程及使用手册，是类国外w3schools的W3C学习社区及菜鸟编程平台。
- Canonical
- https://www.w3cschool.cn
- Language
- zh
- Charset
- UTF-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN
- CDN provider
- —
- IP address
- 47.106.199.63
- ASN
- AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Asseco Data Systems S.A.
- Subject
- *.w3cschool.cn
- Valid from
- Apr 13, 2026
- Valid to
- Oct 29, 2026
- Days until expiry
- 93
- SAN domains
- *.w3cschool.cn, w3cschool.cn
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 7 cookie(s) observed
Content & assets
Headings
H1 1 · H2 5 · H3 44
Links
370 internal · 25 external · 1 broken
Images
325 total · 20 missing alt
Scripts / Styles
9 scripts · 3 stylesheets
JS / CSS size
344 KB · 91.4 KB
Page size
247 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 16
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Missing viewport meta tag
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://w3cschool.cn
- Final URL
- https://www.w3cschool.cn/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 678 ms
- HTML size
- 247 KB
- Redirect chain
- https://w3cschool.cn → https://www.w3cschool.cn/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does w3cschool.cn use?
- w3cschool.cn is built with PHP, jQuery.
- Is w3cschool.cn secure (HTTPS)?
- Yes. w3cschool.cn uses TLS 1.3 with a certificate issued by Asseco Data Systems S.A., valid until Oct 29, 2026.
- Who hosts w3cschool.cn?
- w3cschool.cn is hosted on ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN.
- What is w3cschool.cn's SEO score?
- w3cschool.cn scored 75/100 for SEO in the latest analysis (fair).
- What is w3cschool.cn's overall website score?
- w3cschool.cn has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.
- Is w3cschool.cn hiring?
- w3cschool.cn has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card