Jon.cz - SEO Checker

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Overview of the SEO Check
Meta information
98% 
Page quality
85% 
Page structure
75% 
Link structure
73% 
Server
50% 
External factors
100% 
SEO Score
Response time
0.20 s
File size
139.30 kB
Words
1431
Media files
20
Number of links
59 internal / 11 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Internet JON.CZ | Vysokorychlostní internet
The domain is used in the page's title.
There are no duplicate words in the title
Meta description
(Critically important)
Připojte se k rychlému internetu od JON.CZ. Stabilní síť, skvělá televize a výhodné volání. Jsme tu pro vás 24/7.
The length of the meta description is perfect. (689 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: cs
Language defined in HTML: cs
Language defined in HTTP-Equiv meta tag: cs
Server location: Czechia
The following language is defined by HTML: cs
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1.0
authorJON.CZ
descriptionPřipojte se k rychlému internetu od JON.CZ. Stabilní síť, skvělá televize a výhodné volání. Jsme tu pro vás 24/7.
keywordsinternet,poskytovatel,televize,telekomunikace,středočeský,volání
robotsall
google-site-verificationVBOmAgZxjDwEJLkxqttbOU72aOn4LPuqD6bTj2_Yrwo
facebook-domain-verification8xktow4k390uymq62921rzu9ameubx
format-detectiontelephone=no
msapplication-TileColor#FFFFFF
msapplication-TileImagehttps://www.jon.cz/favicon/mstile-144x144.png
msapplication-square70x70logohttps://www.jon.cz/favicon/mstile-70x70.png
msapplication-square150x150logohttps://www.jon.cz/favicon/mstile-150x150.png
msapplication-wide310x150logohttps://www.jon.cz/favicon/mstile-310x150.png
msapplication-square310x310logohttps://www.jon.cz/favicon/mstile-310x310.png
langcs
og:titleJON.CZ – Rychlý internet, televize a volání
og:descriptionPřipojte se k rychlému internetu od JON.CZ. Stabilní síť, skvělá televize a výhodné volání. Jsme tu pro vás 24/7.
og:imagehttps://www.jon.cz/images/upload/original/homepage.webp
og:urlhttps://jon.cz/
og:typewebsite
og:localecs_CZ
Content-Languagecs
charsetutf-8

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Page quality

Content
(Critically important)
There are 2 text duplicates on this page:
  • Duplicate: GDPR Ctíme zákon o uchování a zpracování osobních údajů, které nám pos...
This page contains 1431 words. That's ok.
24.4% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
21 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
The average number of words per sentence of 11.88 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
This page loads 15 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1.0" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The following tag is repeated too often: gdpr
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/assets/img/apple-icon.webpmacOS
https://www.jon.cz/assets/img/windows.webpWindows
/assets/img/logo_big_white.pngJON.CZ
https://www.jon.cz/assets/img/logo_big.pngJON.CZ
https://www.jon.cz/images/skylink_logo.pngSkylink
/images/internet/wifinak1.webpWifiňák
/images/metronet/security.svgSecurity
/images/metronet/Triangle.svgShield
/images/metronet/security.svgSecurity
https://www.jon.cz/images/volani/optika.svgShield
/images/metronet/security.svgSecurity
/images/metronet/Shield-pink.svgShield
/images/metronet/security.svgSecurity
/images/metronet/Shield.svgShield
/assets/img/logo_big_white.pngJON.CZ
/assets/img/team-viewer.svgTeamViewer
/images/footer/address.svgAdresa
https://www.jon.cz/images/footer/email.svgE-mailová adresa
https://www.jon.cz/images/footer/phone.svgTelefonní číslo
/images/footer/whatsapp.svgWhatsApp

Page structure

H1 heading
(Critically important)
Rychlý internet. Spolehlivé připojení
The H1 heading is perfect.
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 Rychlý internet. Spolehlivé připojení
H2 Děkujeme za váš zájem.
H2 Děkujeme za váš zájem. Duplicate text
H2 Ze světa JON.CZ
H3 Přihlaste se do světa novinek JON.CZ
H3 O nás
H3 Internet
H3 Televize
H3 Kontakty
H5 Mám zájem
H5 Napište nám svou recenzi.
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
There are 11 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.google.com/intl/cs...External Subdomain Více informací
/assets/downloads/TeamViewer/m...IMG-ALT macOS
/assets/downloads/TeamViewer/W...IMG-ALT Windows
/assets/downloads/TeamViewer/m...zde
/assets/downloads/TeamViewer/W...Text duplicate zde
https://wa.me/+420770332393New window External WhatsApp
https://www.jon.cz/Osobní
https://www.jon.cz/firmy/Pro firmy
https://wa.me/+420770332393New window External Text duplicate WhatsApp
https://www.jon.cz/kontakt/Kontakty
https://www.jon.cz/IMG-ALT JON.CZ
https://www.jon.cz/internet/Internet
https://www.jon.cz/jon-security/JON Security
https://www.jon.cz/optika-domu/Optika do domu
/internet/nejrychlejsi/Optika 10 000 Mb/s
https://www.jon.cz/chytra-wifi/Chytrá WiFi
https://nettest.cz/cs/New window External Měření rychlosti
/televize/telka-jon-cz/Telka JON
/televize/skylink/Skylink
https://www.jon.cz/volani/Volání
/chytre-balicky/Balíčky služeb
/zabezpeceni/kamery/Kamery
https://www.jon.cz/blog/Blog
https://www.jon.cz/podpora/Podpora
https://www.jon.cz/onas/O JON.CZ
https://www.jon.cz/kontakt/Text duplicate Kontakty
https://www.jon.cz/kariera/Kariéra
https://www.jon.cz/kestazeni/Dokumenty ke stažení
https://www.jon.cz/pro-media/Pro média
https://www.jon.cz/ceniky/Ceník
https://www.jon.cz/kontakt/Text duplicate Kontakty
https://portal.jon.cz/sign/New window External Subdomain Zákaznický portál
/ochrana-osobnich-udaju/New window Více
/internet/?section=tariffsZobrazit tarify
/televize/skylink/Text duplicate Zobrazit tarify
https://www.jon.cz/volani/Text duplicate Zobrazit tarify
https://www.jon.cz/optika-domu/O službě
/internet/nejrychlejsi/Text duplicate O službě
/chytre-balicky/Text duplicate O službě
https://www.jon.cz/jon-security/Text duplicate O službě
https://www.jon.cz/onas/O nás
/blog/detail/jak-na-bezpecne-o...Jak na bezpečné online nákupy
/blog/detail/tipy-na-to-jak-pl...Tipy na to, jak platit pohodlně a vyhnout se poplatku za platbu v hotovosti
/blog/detail/jak-podvodnici-la...Jak podvodníci lámou rekordy: Jsou vaše úspory v ohrožení?
/blog/detail/jak-poznat-podvod...Jak poznat podvodnou aplikaci na mobilu a chránit své údaje?
/blog/detail/kyberneticke-utok...Kybernetické útoky na banky: Co na vás čeká a jak se můžete bránit
/blog/detail/ovladani-domova-p...Ovládání domova přes internet
https://www.jon.cz/blog/Přejít na blog
https://www.jon.cz/Text duplicate IMG-ALT JON.CZ
https://www.facebook.com/joncz...New window External Subdomain No Text
https://www.instagram.com/jon.cz/New window External Subdomain No Text
https://www.linkedin.com/compa...New window External Subdomain No Text
https://www.jon.cz/faq/FAQ – časté dotazy
https://www.jon.cz/onas/Text duplicate O JON.CZ
https://www.jon.cz/kontakt/Kontakt
https://www.jon.cz/kariera/Text duplicate Kariéra
https://www.jon.cz/kestazeni/Text duplicate Dokumenty ke stažení
/ochrana-osobnich-udaju/GDPR
https://www.jon.cz/cenik-prace/Ceník práce a materiálu
https://www.jon.cz/cookies/Nastavení cookies
/internet/?section=dostupnostOvěření dostupnosti
/internet/?section=wirelessBezdrátový internet
/internet/?section=opticalOptický internet
https://nettest.cz/cs/New window External Text duplicate Měření rychlosti
https://www.jon.cz/ceniky/Ceník všech služeb
/televize/telka-jon-cz/Telka JON.CZ
/televize/skylink/Text duplicate Skylink
https://www.jon.cz/ceniky/Text duplicate Ceník všech služeb
https://maps.app.goo.gl/dHdz3S...New window External Subdomain Na Pobřeží 108,
 Kolín 280 02
https://wa.me/+420770332393New window External Text duplicate WhatsApp

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.jon.cz/"
HTTP header
(Important)
The X-powered header is sent within the response header. (unnecessary)
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
This page loads 9 CSS files. This may affect the page load time negatively.
This page loads 15 JavaScript files. This may affect the load time negatively.
The page response time is excellent with 0.20 seconds.
The file size of the HTML document is fine (139 kB).

HTTP Response Header

NameValue
dateWed, 18 Jun 2025 15:25:42 GMT
serverApache
x-powered-byNette Framework
x-frame-optionsSAMEORIGIN
pragmano-cache
cache-controlno-cache, must-revalidate
expiresWed, 18 Jun 2025 14:25:42 GMT
varyX-Requested-With,Accept-Encoding
set-cookie109 Characters
content-encodinggzip
content-length24612
content-typetext/html; charset=utf-8
statuscode200
http_versionHTTP/1.1

External factors

This website has excellent links from other websites.
This page has backlinks from 43 referring domains.
This page has 1,161 backlinks.
This page has backlinks from 34 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

Sitemap: https://www.jon.cz/sitemap.xml

User-agent: *
Disallow:

Similar sites

Search preview

www.jon.cz
Internet JON.CZ | Vysokorychlostní internet
Připojte se k rychlému internetu od JON.CZ. Stabilní síť, skvělá televize a výhodné volání. Jsme tu pro vás 24/7.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
JON84%Check
Internet79%Check
internet televize66%Check
Internet JON.CZ64%Check
Vysokorychlostní internet61%Check
Televize50%Check
pole50%Check
rychlost46%Check
internetu43%Check
Připojte43%Check
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