vietjack.com
Trang giải bài tập, khóa học, đề thi, giáo án, website giáo dục nhiều người truy cập nhất Việt Nam
Last scanned Aug 1, 2026, 5:00 AM · 11 views
Overall score
Fair
Summary
Trang giải bài tập, khóa học, đề thi, giáo án, website giáo dục nhiều người truy cập nhất Việt Nam. This website uses Google Analytics. SEO is fair (55/100) and accessibility is fair (60/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Title longer than 60 characters.
Trang giải bài tập, khóa học, đề thi, giáo án, website giáo dục nhiều người truy cập nhất Việt Nam
Top issues to fix
13 issues found · 4 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.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
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.
+7 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
130 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
0 overall since Jul 25, 2026
- Overall
- 67
- SEO
- 55
- Security
- 65
- Performance
- 90
- Accessibility
- 60
Organization
Company details published in this site's own structured data.
Trang giải bài tập, khóa học, đề thi, giáo án, website giáo dục nhiều người truy cập nhất Việt Nam
Contact
Email, phone, and address published on this site's own pages.
- hotro@vietjack.com
Meta tags
- Title
- Trang giải bài tập, khóa học, đề thi, giáo án, website giáo dục nhiều người truy cập nhất Việt Nam
- Description
- Trang giải bài tập, khóa học, đề thi, giáo án, website giáo dục nhiều người truy cập nhất Việt Nam
- Canonical
- Language
- vi
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1.0,user-scalable=yes
- Robots meta
- 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
- Sectigo Limited
- Subject
- *.vietjack.com
- Valid from
- Jun 8, 2026
- Valid to
- Dec 23, 2026
- Days until expiry
- 144
- SAN domains
- *.vietjack.com, vietjack.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 0 · H2 3 · H3 73
Links
1031 internal · 34 external · 20 broken
Images
40 total · 31 missing alt
Scripts / Styles
12 scripts · 8 stylesheets
JS / CSS size
849 B · 1.3 KB
Page size
316 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Title longer than 60 characters
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- No H1 heading found
Scan details
- Requested URL
- https://vietjack.com
- Final URL
- https://vietjack.com
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 124 ms
- HTML size
- 316 KB
- Redirect chain
- https://vietjack.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does vietjack.com use?
- vietjack.com is built with Google Analytics, Meta Pixel.
- Is vietjack.com secure (HTTPS)?
- Yes. vietjack.com uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Dec 23, 2026.
- Who hosts vietjack.com?
- Hosting provider information for vietjack.com is not available yet.
- What is vietjack.com's SEO score?
- vietjack.com scored 55/100 for SEO in the latest analysis (fair).
- What is vietjack.com's overall website score?
- vietjack.com has an overall SiteGraph score of 67/100, combining SEO, performance, security, and accessibility.
- Has vietjack.com's score changed over time?
- vietjack.com's overall score has stayed steady at 67/100 since Jul 25, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card