What technology does chmi.cz use?

chmi.cz is built with Bootstrap, jQuery, Apache.

Is chmi.cz secure (HTTPS)?

Yes. chmi.cz uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Mar 7, 2027.

Hosting provider information for chmi.cz is not available yet.

What is chmi.cz's SEO score?

chmi.cz scored 80/100 for SEO in the latest analysis (great).

What is chmi.cz's overall website score?

chmi.cz has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.

chmi.cz

Úvod

Last scanned Jul 26, 2026, 5:17 AM

Overall score

Great

Summary

Úvodní stránka Českého hydrometeorologického ústavu. This website uses Apache. SEO is good (80/100) and accessibility is good (85/100). Security scores excellent (100/100) and performance good (75/100). Top issue: No structured data (JSON-LD) found.

Úvodní stránka Českého hydrometeorologického ústavu

Top issues to fix

6 issues found

1 cookie without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.
More than 20% of images are missing alt text
Accessibility
Add alt attributes to the remaining images (use alt="" for purely decorative ones).
8 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

3 issue(s) found

Performance

384 ms

100

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

Úvodní stránka Českého hydrometeorologického ústavu

X (Twitter)YouTube Facebook Instagram

Contact

Email, phone, and address published on this site's own pages.

Email: chmi@chmi.cz info@chmi.cz

Meta tags

Title: Úvod
Description: Úvodní stránka Českého hydrometeorologického ústavu
Canonical: https://www.chmi.cz
Language: cs-CZ
Charset: UTF-8
Viewport: initial-scale=1.0, width=device-width
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Bootstrap jQuery Apache

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: *.chmi.cz
Valid from: Feb 4, 2026
Valid to: Mar 7, 2027
Days until expiry: 224
SAN domains: *.chmi.cz, chmi.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 1 · H2 9 · H3 48

Links

157 internal · 22 external · 8 broken

Images

127 total · 35 missing alt

Scripts / Styles

72 scripts · 6 stylesheets

JS / CSS size

1.3 MB · 21.2 KB

Page size

627 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://chmi.cz
Final URL: https://www.chmi.cz
HTTP status: 200
HTTP version: HTTP/2
Response time: 372 ms
HTML size: 627 KB
Redirect chain: https://chmi.cz → https://www.chmi.cz

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does chmi.cz use?: chmi.cz is built with Bootstrap, jQuery, Apache.
Is chmi.cz secure (HTTPS)?: Yes. chmi.cz uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Mar 7, 2027.
Who hosts chmi.cz?: Hosting provider information for chmi.cz is not available yet.
What is chmi.cz's SEO score?: chmi.cz scored 80/100 for SEO in the latest analysis (great).
What is chmi.cz's overall website score?: chmi.cz has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.