Physikbuch.schule - SEO Checker

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Overview of the SEO Check
Meta information
77% 
Page quality
52% 
Page structure
95% 
Link structure
88% 
Server
100% 
External factors
75% 
SEO Score
Response time
0.03 s
File size
12.10 kB
Words
44
Media files
3
Number of links
4 internal / 7 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Physik Libre
The page title is too short. (109 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
Freies Physikbuch für die Sekundarstufe II
The length of the meta description is perfect. (261 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: de
Server location: United States of America
The language is not specified in the HTML markup.
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel prev meta tag on this page.
Rel next URL https://physikbuch.schule/licenses.html
The rel next and prev tags are set correctly.
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 character encoding is not specified in the HTTP header.
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
descriptionFreies Physikbuch für die Sekundarstufe II
generatorbookdown 0.27 and GitBook 2.6.7
github-reponot-available-yet
authorMichael A. Rundel, et al.
viewportwidth=device-width, initial-scale=1
apple-mobile-web-app-capableyes
apple-mobile-web-app-status-bar-styleblack
msapplication-TileColor#2d89ef
theme-color#ffffff
twitter:cardsummary
twitter:titlePhysik Libre
twitter:descriptionFreies Physikbuch für die Sekundarstufe II
twitter:imagehttps://physikbuch.schule/media/default.jpg
og:titlePhysik Libre
og:typebook
og:imagehttps://physikbuch.schule/media/default.jpg
og:descriptionFreies Physikbuch für die Sekundarstufe II
X-UA-CompatibleIE=edge
nextlicenses.html
charsetutf-8

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Page quality

Content
(Critically important)
There are only 44 words on this page. Use at least 250 words to provide useful information.
Words from the H1 heading are not used in the page content.
Only 1 paragraph/s was/were found on this page.
25% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 10.67 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" 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)
Alt text (alternative text) is correctly used on all found images.
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
/media/cover-web.svgPhysik Libre CoverPhysik Libre Cover
...en-By-Human-Not-By-AI-Badge-DE-white.svgVerfasst von Menschen, nicht von KI
https://physikbuch.schule/media/by-sa.svgCreative Commons / Namensnennung-Share Alike 4.0

Page structure

H1 heading
(Critically important)
Physik Libre
The H1 heading is too short (12 characters). It should be at least 20 Characters long.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Physik Libre
There are too few (4) internal links on this page.
1 links don't have an anchor text.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 7 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://physikbuch.schule/Physik Libre
/acknowledgments.htmlet al.
https://commons.wikimedia.org/...External Subdomain Astronaut Robert L. Stewart - frei und ungebunden
https://de.wikipedia.org/wiki/...External Subdomain NASA
https://de.wikipedia.org/wiki/...External Subdomain Anchor public domain
https://software.sil.org/gentium/External Subdomain Gentium - A typeface for the nations
http://scripts.sil.org/cms/scr...External Subdomain Open Font License
https://notbyai.fyi/External IMG-ALT Verfasst von Menschen, nicht von KI
https://creativecommons.org/li...External IMG-ALT Creative Commons / Namensnennung-Share Alike 4.0
/privacy-policy.htmlDatenschutzerklärung
/licenses.htmlNo Text

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://physikbuch.schule/"
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 0.03 seconds.
The file size of the HTML document is fine (12 kB).

HTTP Response Header

NameValue
servernginx
dateWed, 18 Mar 2026 03:39:11 GMT
content-typetext/html
varyAccept-Encoding
last-modifiedSun, 06 Jul 2025 10:33:30 GMT
etagW/"686a50fa-3068"
content-encodinggzip
statuscode200
http_versionHTTP/2

External factors

This page has only a few links from other websites.
This page only has backlinks from 25 referring domains.
This page only has 927 backlinks.
This page only has few backlinks from 17 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

physikbuch.schule
Physik Libre
Freies Physikbuch für die Sekundarstufe II

Most important keywords

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

KeywordResultRecheck
Physik93%Check
Physik Libre82%Check
Libre70%Check
frei51%Check
ENDIF39%Check
Creator39%Check
Michael39%Check
Rundel39%Check
Titelbild39%Check
Astronaut39%Check
Show more keywords and terms

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