cez.cz
Skupina ČEZ
Last scanned Jul 26, 2026, 5:47 AM
Overall score
Excellent
Summary
Skupina ČEZ patří mezi nejvýznamnější výrobce, distributory, obchodníky v oblasti elektřiny a tepla, zemního plynu. This website uses Next.js. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance good (80/100). Top issue: robots.txt not found.
Skupina ČEZ patří mezi nejvýznamnější výrobce, distributory, obchodníky v oblasti elektřiny a tepla, zemního plynu.
Top issues to fix
5 issues found · 1 high priority
Slow estimated load (4.1s)
PerformanceUse a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.
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.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
2 issue(s) found
Performance
4.13 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Skupina ČEZ patří mezi nejvýznamnější výrobce, distributory, obchodníky v oblasti elektřiny a tepla, zemního plynu.
Meta tags
- Title
- Skupina ČEZ
- Description
- Skupina ČEZ patří mezi nejvýznamnější výrobce, distributory, obchodníky v oblasti elektřiny a tepla, zemního plynu.
- Canonical
- https://www.cez.cz/cs
- Language
- cs
- Charset
- utf-8
- Viewport
- width=device-width
- 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
- DigiCert Inc
- Subject
- www.cez.cz
- Valid from
- Jun 3, 2026
- Valid to
- Dec 18, 2026
- Days until expiry
- 143
- SAN domains
- www.cez.cz, cez.cz
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyEnabled
Compression: gzip · 3 cookie(s) observed
Content & assets
Headings
H1 1 · H2 19 · H3 14
Links
87 internal · 16 external · 20 broken
Images
15 total · 0 missing alt
Scripts / Styles
36 scripts · 1 stylesheets
JS / CSS size
134 KB · 16.7 KB
Page size
249 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://cez.cz
- Final URL
- https://www.cez.cz/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 4.12 s
- HTML size
- 249 KB
- Redirect chain
- https://cez.cz → https://www.cez.cz/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does cez.cz use?
- cez.cz is built with React, Next.js.
- Is cez.cz secure (HTTPS)?
- Yes. cez.cz uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Dec 18, 2026.
- Who hosts cez.cz?
- Hosting provider information for cez.cz is not available yet.
- What is cez.cz's SEO score?
- cez.cz scored 90/100 for SEO in the latest analysis (excellent).
- What is cez.cz's overall website score?
- cez.cz has an overall SiteGraph score of 92/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card