cez.cz
Skupina ČEZ
Last scanned Aug 5, 2026, 8:00 PM · 24 views
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 good (85/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.
Skupina ČEZ patří mezi nejvýznamnější výrobce, distributory, obchodníky v oblasti elektřiny a tepla, zemního plynu.
Top issues to fix
3 issues found
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
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.
SEO
3 issue(s) found
Performance
284 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+4 overall since Jul 26, 2026
- Overall
- 96
- SEO
- 85
- Security
- 100
- Performance
- 100
- Accessibility
- 100
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
- 89.111.76.144
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
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
- 135
- 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 · 1 cookie(s) observed
Content & assets
Headings
H1 2 · H2 19 · H3 14
Links
88 internal · 16 external · 0 broken
Images
15 total · 0 missing alt
Scripts / Styles
54 scripts · 2 stylesheets
JS / CSS size
777 KB · 209 KB
Page size
248 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Multiple H1 headings found
- 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
- 279 ms
- HTML size
- 248 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 85/100 for SEO in the latest analysis (great).
- What is cez.cz's overall website score?
- cez.cz has an overall SiteGraph score of 96/100, combining SEO, performance, security, and accessibility.
- Has cez.cz's score changed over time?
- cez.cz's overall score has improved by 4 points (from 92 to 96) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card