skolaonline.cz
Making sure you're not a bot!
Last scanned Aug 2, 2026, 10:00 PM · 5 views
Overall score
Fair
Summary
This website uses Nginx. SEO is fair (60/100) and accessibility is fair (70/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing meta description.
Top issues to fix
12 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 meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
2 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.
+6 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
133 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
-3 overall since Jul 26, 2026
- Overall
- 76
- SEO
- 60
- Security
- 75
- Performance
- 100
- Accessibility
- 70
Meta tags
- Title
- Making sure you're not a bot!
- Description
- Canonical
- Language
- en
- Charset
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- noindex,nofollow
- 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
- Alpiro s.r.o.
- Subject
- skolaonline.cz
- Valid from
- May 11, 2026
- Valid to
- Nov 25, 2026
- Days until expiry
- 115
- SAN domains
- skolaonline.cz, *.dmsoftware.cz, *.skolaonline.cz
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyEnabled
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
0 internal · 2 external · 2 broken
Images
2 total · 2 missing alt
Scripts / Styles
6 scripts · 2 stylesheets
JS / CSS size
611 B · 852 B
Page size
4.2 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- 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
Scan details
- Requested URL
- https://skolaonline.cz
- Final URL
- https://skolaonline.cz
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 133 ms
- HTML size
- 4.2 KB
- Redirect chain
- https://skolaonline.cz
See something wrong on this report? Request a correction
Related websites
Same technology stack
contao.org
Contao Open Source CMS
gabor.com
Gabor Shoes GmbH | Offizieller Online-Shop für Gabor Schuhe
andritz.com
ANDRITZ GROUP
anisearch.de
aniSearch ‒ We’re all about anime and manga!
daidoanket.vn
Báo Đại Đoàn Kết
hostux.net
Hostux Network – Privacy-Focused & Open-Source Tools
Frequently asked questions
- What technology does skolaonline.cz use?
- skolaonline.cz is built with Nginx.
- Is skolaonline.cz secure (HTTPS)?
- Yes. skolaonline.cz uses TLS 1.3 with a certificate issued by Alpiro s.r.o., valid until Nov 25, 2026.
- Who hosts skolaonline.cz?
- Hosting provider information for skolaonline.cz is not available yet.
- What is skolaonline.cz's SEO score?
- skolaonline.cz scored 60/100 for SEO in the latest analysis (fair).
- What is skolaonline.cz's overall website score?
- skolaonline.cz has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
- Has skolaonline.cz's score changed over time?
- skolaonline.cz's overall score has declined by 3 points (from 79 to 76) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card