duytan.edu.vn
Last scanned Aug 3, 2026, 8:00 AM · 6 views
Overall score
Great
Summary
This website uses jQuery. SEO is fair (50/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing <title>.
Top issues to fix
10 issues found · 3 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing title tag
SEOAdd a unique, descriptive <title> tag — it's the single most important on-page SEO element.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
+4 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
912 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
+6 overall since Jul 26, 2026
- Overall
- 81
- SEO
- 50
- Security
- 90
- Performance
- 100
- Accessibility
- 90
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- Phone
- 02363650403
Meta tags
- Title
- Description
- Canonical
- http://duytan.edu.vn
- Language
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- INDEX, FOLLOW
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- GlobalSign nv-sa
- Subject
- duytan.edu.vn
- Valid from
- May 18, 2026
- Valid to
- Dec 3, 2026
- Days until expiry
- 121
- SAN domains
- duytan.edu.vn, *.duytan.edu.vn
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyEnabled
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 12 · H3 28
Links
123 internal · 61 external · 20 broken
Images
70 total · 0 missing alt
Scripts / Styles
9 scripts · 6 stylesheets
JS / CSS size
4.7 KB · 0 B
Page size
126 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing <title>
- Missing meta description
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Missing <html lang> attribute
Scan details
- Requested URL
- https://duytan.edu.vn
- Final URL
- https://duytan.edu.vn
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 910 ms
- HTML size
- 126 KB
- Redirect chain
- https://duytan.edu.vn
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does duytan.edu.vn use?
- duytan.edu.vn is built with Bootstrap, jQuery.
- Is duytan.edu.vn secure (HTTPS)?
- Yes. duytan.edu.vn uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Dec 3, 2026.
- Who hosts duytan.edu.vn?
- Hosting provider information for duytan.edu.vn is not available yet.
- What is duytan.edu.vn's SEO score?
- duytan.edu.vn scored 50/100 for SEO in the latest analysis (fair).
- What is duytan.edu.vn's overall website score?
- duytan.edu.vn has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
- Has duytan.edu.vn's score changed over time?
- duytan.edu.vn's overall score has improved by 6 points (from 75 to 81) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card