Ols-koeln.de - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
100% 
Page quality
50% 
Page structure
79% 
Link structure
93% 
Server
91% 
External factors
78% 
SEO Score
Response time
0.34 s
File size
18.80 kB
Words
175
Media files
5
Number of links
45 internal / 3 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Realschule Köln-Wahn - Otto-Lilienthal-Schule
The length of the page title is perfect. (413 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Willkommen bei der Online-Präsenz der Otto-Lilienthal-Schule, Realschule in Köln-Wahn.
The length of the meta description is perfect. (550 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://ols-koeln.de/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: de
Language defined in HTML: de
Server location: United States of America
The following language is defined by HTML: de
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
robotsindex,follow
descriptionWillkommen bei der Online-Präsenz der Otto-Lilienthal-Schule, Realschule in Köln-Wahn.
generatorContao Open Source CMS
viewportwidth=device-width, initial-scale=1, shrink-to-fit=no
msapplication-TileColor#da532c
msapplication-config/files/ols/Favicons/browserconfig.xml
theme-color#ffffff
langde
og:titleOLS Köln
og:descriptionOtto-Lilienthal-Realschule Köln
og:image/files/ols/Favicons/android-chrome-512x512.png
og:typewebsite
x-ua-compatibleie=edge
charsetUTF-8

Automatically check ols-koeln.de including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Page quality

Content
(Critically important)
There are only 175 words on this page. Use at least 250 words to provide useful information.
Some words from the page title are not used within the pages content
29.7% of the text are stop words.
The page contains a listing, which indicates a good text layout.
5 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 13 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1, shrink-to-fit=no" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 6 tags for this page.
Image SEO
(Somewhat important)
1 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
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/images/x/Logo-xqep6nyfj53a0t1.svgLogo der OLS Köln
...ages/c/OLS_Fruehling-6sevwt0tgajs9ny.jpgNo alt attribute provided
...mages/d/20260520_03-v98277h5pksgcb4.jpegZwei Schülerinnen begutachten eine Plakatwand
...mages/n/20260520_01-z36qvq567cs36hp.jpegDas Spiel Vier gewinnt steht auf einem Tisch
...mages/j/20260518_01-evbwcty0c77hb1v.jpegButtons mit Aufdruck DLR_School_Lab

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H2 Überblick
H2 Aktuelles
H3 Praktikumsausstellung der 9. Klassen
H3 Gemeinsam spielen, gemeinsam lachen – unser erstes Vier-Gewinnt-Turnier
H3 Exkursion ins DLR-School-Lab: Forschen, Staunen, Ausprobieren!
H4 Adresse
H4 Kontakt
Baselink: https://ols-koeln.de/
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 3 external links on this page.

Found links on this page

LinkAttributesAnchor text
/otto-lilienthal-schuleIMG-ALT Logo der OLS Köln
https://ols-koeln.de/Navigation überspringen
/vertretungsplanVertretungsplan
A-TITLE Vertretungsplan
https://ols-koeln.de/termineTermine
A-TITLE Termine
https://ols-koeln.de/ueberblickÜberblick
A-TITLE Überblick
/ueberblick/personen/personen-...Personen
A-TITLE Personen
/ueberblick/organigrammOrganigramm
A-TITLE Organigramm
/ueberblick/gremienGremien
A-TITLE Gremien
/ueberblick/profilProfil
A-TITLE Profil
/ueberblick/faecherFächer
A-TITLE Fächer
/ueberblick/kooperationenKooperationen
A-TITLE Kooperationen
https://ols-koeln.de/rueckblickRückblick
A-TITLE Rückblick
https://ols-koeln.de/schullebenSchulleben
A-TITLE Schulleben
https://ols-koeln.de/ausblickAusblick
A-TITLE Ausblick
https://ols-koeln.de/infosInfos
A-TITLE Infos
/infos/wechsel-zur-olsWechsel zur OLS
A-TITLE Wechsel zur Otto-Lilienthal-Schule
/infos/buechereiBücherei
A-TITLE Bücherei
/infos/downloadsDownloads
A-TITLE Downloads
/infos/kleiderordnungKleiderordnung
A-TITLE Kleiderordnung
/infos/handyordnungHandyordnung
A-TITLE Handyordnung
/infos/nutzungsordnung-itNutzungsordnung IT
A-TITLE Nutzungsordnung IT
/infos/schliessfaecherSchließfächer
A-TITLE Schließfächer
/infos/beratungBeratung
A-TITLE Beratung
/infos/bildung-und-teilhabeBildung und Teilhabe
A-TITLE Bildung und Teilhabe
https://ols-koeln.de/kontaktKontakt
A-TITLE Kontakt
https://ols-koeln.de/sucheSuche
/ueberblick/personen/personen-...Text duplicate Personen
/ueberblick/profilText duplicate Profil
/ueberblick/faecherText duplicate Fächer
/ueberblick/kooperationenText duplicate Kooperationen
https://ols-koeln.de/infosInformationen
/infos/downloadsText duplicate Downloads
/ueberblick/faecher/EinzigARTig
https://eveeno.com/604002400New window External Anmeldung
/schulleben/schulleben-details...IMG-ALT Zwei Schülerinnen begutachten eine Plakatwand
A-TITLE Den Artikel lesen: Praktikumsausstellung der 9. Klassen
/schulleben/schulleben-details...Praktikumsausstellung der 9. Klassen
A-TITLE Den Artikel lesen: Praktikumsausstellung der 9. Klassen
/schulleben/schulleben-details...Weiterlesen ...
A-TITLE Praktikumsausstellung der 9. Klassen
/schulleben/schulleben-details...IMG-ALT Das Spiel Vier gewinnt steht auf einem Tisch
A-TITLE Den Artikel lesen: Gemeinsam spielen, gemeinsam lachen – unser erstes Vier-Gewinnt-Turnier
/schulleben/schulleben-details...Gemeinsam spielen, gemeinsam lachen – unser erstes Vier-Gewinnt-Turnier
A-TITLE Den Artikel lesen: Gemeinsam spielen, gemeinsam lachen – unser erstes Vier-Gewinnt-Turnier
/schulleben/schulleben-details...Text duplicate Weiterlesen ...
A-TITLE Gemeinsam spielen, gemeinsam lachen – unser erstes Vier-Gewinnt-Turnier
/schulleben/schulleben-details...IMG-ALT Buttons mit Aufdruck DLR_School_Lab
A-TITLE Den Artikel lesen: Exkursion ins DLR-School-Lab: Forschen, Staunen, Ausprobieren!
/schulleben/schulleben-details...Exkursion ins DLR-School-Lab: Forschen, Staunen, Ausprobieren!
A-TITLE Den Artikel lesen: Exkursion ins DLR-School-Lab: Forschen, Staunen, Ausprobieren!
/schulleben/schulleben-details...Text duplicate Weiterlesen ...
A-TITLE Exkursion ins DLR-School-Lab: Forschen, Staunen, Ausprobieren!
https://ols-koeln.de/rueckblick/Chronik
https://www.schulministerium.nrw/New window External Subdomain Ministerium für Schule und Bildung NRW
https://azufi.de/start.phpNew window External Der Azubi-Finder
https://ols-koeln.de/impressumImpressum
A-TITLE Impressum
https://ols-koeln.de/datenschutzDatenschutz
A-TITLE Datenschutz

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://ols-koeln.de/"
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)
The page response time is excellent with 0.34 seconds.
The file size of the HTML document is fine (19 kB).

HTTP Response Header

NameValue
servernginx
dateWed, 27 May 2026 00:54:29 GMT
content-typetext/html; charset=UTF-8
cache-controlno-cache, no-store, private
x-powered-byPHP/8.4.21
x-content-type-optionsnosniff
referrer-policyno-referrer-when-downgrade, strict-origin-when-cross-origin
permissions-policyinterest-cohort=()
strict-transport-securitymax-age=31536000
x-frame-optionsSAMEORIGIN
x-xss-protection1; mode=block
contao-cachemiss
content-encodingbr
statuscode200
http_versionHTTP/2

External factors

This page has only a few links from other websites.
This page only has backlinks from 26 referring domains.
This page only has 41 backlinks.
This page only has few backlinks from 15 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

user-agent:*
disallow:/contao/
disallow:/_contao/

sitemap:https://ols-koeln.de/sitemap.xml

Similar sites

Search preview

ols-koeln.de
Realschule Köln-Wahn - Otto-Lilienthal-Schule
Willkommen bei der Online-Präsenz der Otto-Lilienthal-Schule, Realschule in Köln-Wahn.

Most important keywords

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

KeywordResultRecheck
Köln70%Check
Schule58%Check
Wahn58%Check
Otto-Lilienthal-Schule56%Check
OLS50%Check
Schule NRW46%Check
Gemeinsam43%Check
Schule und Bildung42%Check
DLR40%Check
Klassen38%Check
Show more keywords and terms

Automatically check ols-koeln.de including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions