vndoc.com
Tài liệu, đề thi, trắc nghiệm, giải bài tập, học tập, tiếng Anh - VnDoc.com
Last scanned Jul 26, 2026, 3:19 PM
Overall score
Fair
Summary
Tài liệu, học tập, trắc nghiệm, tiếng anh, văn bản, biểu mẫu. This website is hosted on VIETEL-AS-AP - Viettel Group, VN. SEO is good (85/100) and accessibility is fair (60/100). Security scores fair (65/100) and performance good (85/100). Top issue: Title longer than 60 characters.
vndoc.com
Tài liệu, học tập, trắc nghiệm, tiếng anh, văn bản, biểu mẫu
- 56 Duy Tân, Cầu Giấy, Hà Nội, Việt Nam, 100000
- Hosted on VIETEL-AS-AP - Viettel Group, VN
Top issues to fix
10 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.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
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.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
+4 more issues — details in the sections below.
SEO
3 issue(s) found
Performance
290 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- info@meta.vn
- Address
- 56 Duy Tân, Cầu Giấy, Hà Nội, Việt Nam, 100000
Meta tags
- Title
- Tài liệu, đề thi, trắc nghiệm, giải bài tập, học tập, tiếng Anh - VnDoc.com
- Description
- VnDoc chia sẻ các tài liệu học tập: Đề thi, trắc nghiệm, giải bài tập, bài tập cuối tuần,.... Mạng xã hội Giáo dục hàng đầu Việt Nam
- Canonical
- https://vndoc.com
- Language
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
- https://vndoc.com/manifest.json
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- Hosting provider
- VIETEL-AS-AP - Viettel Group, VN
- CDN provider
- —
- IP address
- 171.244.33.19
- ASN
- AS7552 (VIETEL-AS-AP - Viettel Group, VN)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Sectigo Limited
- Subject
- vndoc.com
- Valid from
- Apr 3, 2026
- Valid to
- Oct 18, 2026
- Days until expiry
- 84
- SAN domains
- vndoc.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 25 · H3 127
Links
147 internal · 5 external · 1 broken
Images
73 total · 72 missing alt
Scripts / Styles
4 scripts · 0 stylesheets
JS / CSS size
1.4 MB · 122 KB
Page size
212 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Title longer than 60 characters
- Meta description longer than 160 characters
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- Missing <html lang> attribute
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://vndoc.com
- Final URL
- https://vndoc.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 286 ms
- HTML size
- 212 KB
- Redirect chain
- https://vndoc.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does vndoc.com use?
- We did not detect any specific technologies for vndoc.com in the latest scan.
- Is vndoc.com secure (HTTPS)?
- Yes. vndoc.com uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Oct 18, 2026.
- Who hosts vndoc.com?
- vndoc.com is hosted on VIETEL-AS-AP - Viettel Group, VN.
- What is vndoc.com's SEO score?
- vndoc.com scored 85/100 for SEO in the latest analysis (great).
- What is vndoc.com's overall website score?
- vndoc.com has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.
- What company operates vndoc.com?
- vndoc.com is operated by vndoc.com. Tài liệu, học tập, trắc nghiệm, tiếng anh, văn bản, biểu mẫu
- Is vndoc.com hiring?
- vndoc.com has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card