izus.cz
iZUŠ - informační systém základních uměleckých škol
Last scanned Jul 27, 2026, 3:43 PM
Overall score
Great
Summary
Informační systém základních uměleckých škol iZUŠ - Hlavní strana. This website uses PHP hosted on Blindspot - PRO-ZETA a.s., CZ. SEO is good (75/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.
Informační systém základních uměleckých škol iZUŠ - Hlavní strana
- CZ
- Hosted on Blindspot - PRO-ZETA a.s., CZ
Top issues to fix
10 issues found · 2 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 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.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
+4 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
503 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- iZUŠ - informační systém základních uměleckých škol
- Description
- Informační systém základních uměleckých škol iZUŠ - Hlavní strana
- Canonical
- Language
- cs
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0, user-scalable=yes
- Robots meta
- index, follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Blindspot - PRO-ZETA a.s., CZ
- CDN provider
- —
- IP address
- 91.239.200.79
- ASN
- AS60606 (Blindspot - PRO-ZETA a.s., CZ)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- izus.cz
- Valid from
- Jun 9, 2026
- Valid to
- Sep 7, 2026
- Days until expiry
- 41
- SAN domains
- izus.cz, izus.sk, legacy.aktivityplus.cz, majetek.cloud, pomoczus.cz, pracevzus.cz, prihlaska.zusmeeting.cz, prihlaskadozus.cz, rozvrhzus.cz, soutezezus.cz, urzus.cz, www.izus.cz, www.izus.sk, www.majetek.cloud, www.pomoczus.cz, www.pracevzus.cz, www.prihlaskadozus.cz, www.rozvrhzus.cz, www.soutezezus.cz, www.urzus.cz, www.zakovskysesit.cz, zakovskysesit.cz
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 2 · H2 1 · H3 7
Links
30 internal · 5 external · 6 broken
Images
12 total · 0 missing alt
Scripts / Styles
38 scripts · 14 stylesheets
JS / CSS size
684 KB · 188 KB
Page size
164 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 17
- sitemap.xml
- Found
- URLs in sitemap
- 500
SEO issues
- Missing canonical link
- Multiple H1 headings found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://izus.cz
- Final URL
- https://www.izus.cz/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 500 ms
- HTML size
- 164 KB
- Redirect chain
- https://izus.cz → https://www.izus.cz/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does izus.cz use?
- izus.cz is built with PHP, jQuery, Google Ads, Meta Pixel, Nginx.
- Is izus.cz secure (HTTPS)?
- Yes. izus.cz uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 7, 2026.
- Who hosts izus.cz?
- izus.cz is hosted on Blindspot - PRO-ZETA a.s., CZ.
- What is izus.cz's SEO score?
- izus.cz scored 75/100 for SEO in the latest analysis (fair).
- What is izus.cz's overall website score?
- izus.cz has an overall SiteGraph score of 84/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card