Open.hpi.de - SEO Checker

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Overview of the SEO Check
Meta information
100% 
Page quality
57% 
Page structure
75% 
Link structure
42% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.20 s
File size
30.30 kB
Words
712
Media files
7
Number of links
45 internal / 5 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Free Online Courses in Computer Science, IT & AI | openHPI
The length of the page title is perfect. (544 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Learn computer science, IT, and digital innovation with free interactive online courses on openHPI.
The length of the meta description is perfect. (602 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: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
The specified alternate links have no errors.
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, viewport-fit=cover
google-site-verificationnHh1Z--8CnZ0ae3es3rPl8f9ScyVl2iMhoKcskRN3Z4
csrf-paramauthenticity_token
csrf-tokenA_TX-KwcLIE7hyv8qcKi-r7yXKaA9zqa-FwSODtk5RHiPDEZr5ly47dzCBSLHrlEXQG6tBuObt6eBt_U_UFQzQ
sentry-traceb9a67bf6951a4294a1f85ab5ea4c6387-c1e04d2b9ea54560-0
baggagesentry-trace_id=b9a67bf6951a4294a1f85ab5ea4c6387,sentry-sample_rate=0.5,sentry-sample_rand=0.989865,sentry-sampled=false,sentry-environment=openhpi-production,sentry-public_key=1dd6bf3768f24fc392277656000abebf,sentry-org_id=257002
sentry-dsnhttps://[email protected]/5668447
sentry-environmentopenhpi-production
descriptionLearn computer science, IT, and digital innovation with free interactive online courses on openHPI.
apple-mobile-web-app-titleopenHPI
piwik-hostopen.hpi.de
piwik-site-id1
langen
charsetutf-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
Words from the H1 heading are not used in the page content.
There are 2 text duplicates on this page:
  • Duplicate: From January 1, 2027, providing your age will be mandatory. Without th...
This page contains 712 words. That's ok.
40% of the text are stop words.
The page contains a listing, which indicates a good text layout.
12 paragraphs were found on this page.
No placeholders texts or images were found.
The average number of words per sentence of 14.81 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1.0, viewport-fit=cover" is provided.
Bold and strong tags
(Somewhat important)
The following tag is repeated too often: january 1, 2027
Image SEO
(Somewhat important)
2 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/logo-bd3eaa71.pngopenHPI logo
/assets/logo-bd3eaa71.pngopenHPI logo
...ts/startpage/head_hero/logo-0192fc00.svgNo alt attribute provided
...age/level_selector/beginner-bac96408.pngBeginner level: human sitting at a computer next to textbooks on Java programming and Fundamentals of Computing
...level_selector/intermediate-77dfb902.pngIntermediate level: Human programming on a laptop in a professional setting
...tpage/level_selector/expert-5edaf972.pngExpert level: Woman working with laptop in a data center
/assets/logo_monochrome-af96bdfe.svgNo alt attribute provided

Page structure

H1 heading
(Critically important)
Training in IT and innovation. From experts. Free of charge. At your own pace.
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 Training in IT and innovation. From experts. Free of charge. At your own pace.
H6 Important notice!
H6 Important notice! Duplicate text
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.
There are 5 links with a trivial anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are 5 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://open.hpi.de/pages/aboutAbout openHPI
/channels/ai-service-centerAI Service Center
/channels/clean-it-forumclean-IT
/channels/design-thinkingDesign Thinking
/channels/openhpi-schoolopenHPIschool
https://open.hpi.de/learnLearn
https://open.hpi.de/?locale=deDeutsch
https://open.hpi.de/?locale=enEnglish
/news?locale=enSubdomain Trivial anchor text
here
https://open.hpi.de/IMG-ALT openHPI logo
https://open.hpi.de/sessions/newLog in
https://open.hpi.de/Text duplicate IMG-ALT openHPI logo
/news?locale=enSubdomain Text duplicate Trivial anchor text
here
https://open.hpi.de/pages/aboutText duplicate About openHPI
/channels/ai-service-centerText duplicate AI Service Center
/channels/clean-it-forumText duplicate clean-IT
/channels/design-thinkingText duplicate Design Thinking
/channels/openhpi-schoolText duplicate openHPIschool
https://open.hpi.de/learnText duplicate Learn
https://open.hpi.de/pages/aboutText duplicate About openHPI
/channels/ai-service-centerText duplicate AI Service Center
/channels/clean-it-forumText duplicate clean-IT
/channels/design-thinkingText duplicate Design Thinking
/channels/openhpi-schoolText duplicate openHPIschool
https://open.hpi.de/learnText duplicate Learn
https://open.hpi.de/pages/aboutText duplicate About openHPI
https://open.hpi.de/?locale=deText duplicate Deutsch
https://open.hpi.de/?locale=enText duplicate English
https://open.hpi.de/sessions/newText duplicate Log in
https://open.hpi.de/pages/aboutText duplicate About openHPI
/learn?level=BeginnerDiscover our learning opportunities for beginners
/learn?level=IntermediateDiscover our learning opportunities for intermediate learners
/learn?level=ExpertDiscover our learning opportunities for experts
https://open.hpi.de/newsTrivial anchor text
More
https://open.hpi.de/newsText duplicate Trivial anchor text
More
https://open.hpi.de/newsText duplicate Trivial anchor text
More
https://open.hpi.de/pages/aboutAbout Us
A-TITLE About Us
/pages/code_of_conductCode of Conduct
A-TITLE Code of Conduct
/pages/open_sourceOpen Source
A-TITLE Open Source
https://open.hpi.de/pages/faqFAQ
A-TITLE FAQ
/pages/certificates_and_guidel...Certificates and Guidelines
A-TITLE Certificates and Guidelines
/pages/gamificationGamification
A-TITLE Gamification
https://open.hpi.de/helpdeskHelpdesk
A-TITLE Helpdesk
https://open.hpi.de/pages/imprintImprint
A-TITLE Imprint
/pages/data-protectionData Protection
A-TITLE Data Protection
https://www.facebook.com/OpenHPINew window External Subdomain No Text
https://github.com/openHPINew window External No Text
https://www.linkedin.com/showc...New window External Subdomain No Text
https://www.youtube.com/@HPIop...New window External Subdomain No Text
https://hpi.de/enNew window External Hasso Plattner Institute
A-TITLE Hasso Plattner Institute

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://open.hpi.de/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.20 seconds.
The file size of the HTML document is fine (30 kB).

HTTP Response Header

NameValue
cache-controlmax-age=0, private, must-revalidate
content-encodingzstd
content-typetext/html; charset=utf-8
etagW/"de392b3f11585177885782bb7a15aedf"
link</assets/bootstrap-5d6b4e7a.css>; rel=preload; as=style; crossorigin=anonymous; nopush,</assets/icons-e6692af7.css>; rel=preload; as=style; crossorigin=anonymous; nopush,</assets/styles-ff4db5e7.css>; rel=preload; as=style; crossorigin=anonymous; nopush,</assets/tailwind-fcaa7adb.css>; rel=preload; as=style; crossorigin=anonymous; nopush,</assets/main-dce293ba.js>; rel=modulepreload; as=script; nopush
referrer-policystrict-origin-when-cross-origin
set-cookie427 Characters
varyOrigin
x-cachemiss
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
x-permitted-cross-domain-policiesnone
x-request-id5dd102e8-1df3-4f87-8d99-c13ab08dee09
x-runtime0.107898
x-xss-protection0
dateWed, 14 Oct 2026 00:29:26 GMT
strict-transport-securitymax-age=16000000; includeSubDomains; preload;
statuscode200
http_versionHTTP/2

External factors

This website has excellent links from other websites.
This page has backlinks from 857 referring domains.
This page has 22,744 backlinks.
This page has backlinks from 585 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

# 
# robots.txt
# 
User-Agent: *
Disallow: /verify/*

Similar sites

Search preview

open.hpi.de
Free Online Courses in Computer Science, IT & AI | openHPI
Learn computer science, IT, and digital innovation with free interactive online courses on openHPI.

Most important keywords

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

KeywordResultRecheck
Free73%Check
innovation62%Check
Free Online62%Check
Free Online Courses59%Check
openHPI58%Check
courses58%Check
Online Courses58%Check
Digital Innovation54%Check
interactive online courses54%Check
experts50%Check
Show more keywords and terms

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