Ctan.org - SEO Checker

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Overview of the SEO Check
Meta information
77% 
Page quality
86% 
Page structure
100% 
Link structure
73% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.04 s
File size
18.80 kB
Words
548
Media files
1
Number of links
57 internal / 13 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
CTAN: Comprehensive TeX Archive Network
The length of the page title is perfect. (397 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
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: Germany
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
The alternate link to the page itself is missing.
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
mobile-web-app-capableyes
msapplication-TileColor#2b5797
msapplication-TileImage/assets/favicon/mstile-144x144-13de7449899120a2a279e89581f29f52.png
msapplication-config/assets/favicon/browserconfig-945ed94c904db71e7a7c54d6ae065f5a.xml
theme-color#ffffff
langen
Content-Typetext/html; charset=UTF-8

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Page quality

Content
(Critically important)
This page contains 548 words. That's ok.
35.9% 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.
13 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 14.67 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1.0" is provided.
At least one Apple touch icon is specified.
This page only loads 3 JavaScript files. That's good!
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 11 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)
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
...x-1-bca293031efb62e5747c5b74f65fff6f.pngNo alt attribute provided

Page structure

H1 heading
(Critically important)
The Comprehensive TeX Archive Network
The H1 heading is perfect.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 The Comprehensive TeX Archive Network
H2 Announcements on CTAN-announce
H2 Activity on CTAN
H2 Search on CTAN
H2 Browse CTAN
H2 Contribute to CTAN
H2 Background of CTAN
H2 Did you know?
H2 TeX
H2 Download a TeX System
H2 User Groups
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.
1 links don't have an anchor text.
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 13 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.ctan.org/CTAN Comprehensive TeX Archive Network
https://www.ctan.org/lion/A-TITLE CTAN lion drawing by Duane Bibby
https://www.ctan.org/loginNofollow Login
A-TITLE Login with your personal account
/user/settingsSettings
A-TITLE Adjust the appearance to your taste
https://www.ctan.org/helpHelp
A-TITLE Get some information about this Web site
https://www.ctan.org/Cover
https://www.ctan.org/Text duplicate Cover
https://www.ctan.org/starterStarting out with TeX...
https://www.ctan.org/ctanCTAN Background
https://www.ctan.org/mirrorsMirrors
https://www.ctan.org/lugsTeX user groups
https://www.ctan.org/privacyPrivacy
https://www.ctan.org/creditsCredits
https://www.ctan.org/uploadUpload
https://www.ctan.org/uploadText duplicate Upload
/help/upload-pkgUpload basics
/file/help/ctan/CTAN-upload-ad...Upload addendum
/TDS-guidelinesTeX Directory Structure
https://www.ctan.org/licenseLicenses
https://www.ctan.org/tex-archiveBrowse
https://www.ctan.org/tex-archiveTeX Archive
https://www.ctan.org/pkgPackages
https://www.ctan.org/topics/cloudTopics
https://www.ctan.org/authorContributors
https://www.ctan.org/ctan-annAnnouncements
https://www.ctan.org/searchSearch
/search?ext=newExtended search
/search?ext=false&FILES=onFile search
https://www.ctan.org/CTAN
https://www.ctan.org/texTeX
https://www.ctan.org/pkg6756 packages
https://www.ctan.org/author3059 contributors
/ctan-ann/id/aDqZBqrXEfkf0pP4@...2025-05-31 CTAN update: LinguisTiX
/ctan-ann/id/a111cd13e825c526@...2025-05-30 CTAN update: expltools
/ctan-ann/id/a111cd0ec2366899@...2025-05-30 CTAN update: systeme
/ctan-ann/id/aDi0ovCaTPDsnG1n@...2025-05-29 CTAN update: pgfkeysearch
https://www.ctan.org/ctan-annTrivial anchor text
more
/search?ext=trueadvanced search form
https://www.ctan.org/tex-archivearchive directory
https://www.ctan.org/pkglist of packages
https://www.ctan.org/topiclist of topics
https://www.ctan.org/authorlist of contributors
https://www.ctan.org/uploadupload form
https://www.ctan.org/ctanWhat is CTAN?
https://www.ctan.org/mirrorsCTAN mirrors
/topic/package-develPackage development
/topic/package-develText duplicate Trivial anchor text
more
https://www.ctan.org/texNo Text
http://www-cs-faculty.stanford...External Subdomain Donald E.Knuth
http://www-cs-faculty.stanford...External Subdomain The Art of Computer Programming
https://www.ctan.org/texText duplicate Trivial anchor text
more
https://www.ctan.org/pkg/texliveTeX Live
https://www.ctan.org/pkg/mactexMacTeX
https://www.ctan.org/starterText duplicate Trivial anchor text
more
http://tug.org/External TeX Users Group (TUG)
http://www.dante.de/External Subdomain Deutschsprachige Anwendervereinigung TeX e.V. (DANTE)
https://www.ctan.org/lugsText duplicate Trivial anchor text
more
https://www.ctan.org/guestbookGuest Book
A-TITLE Leave some words for other visitors
https://www.ctan.org/sitemapSitemap
A-TITLE Show the structure of this site
https://www.ctan.org/contactContact
A-TITLE Get contact information for the Web site
/help/contact-authorContact Author
A-TITLE Get help on how to contact an author
https://twitter.com/share?url=...New window External
A-TITLE Share link to this page on Twitter
https://www.facebook.com/share...New window External Subdomain
A-TITLE Share link to this page on Facebook
https://plus.google.com/share?...New window External Subdomain
A-TITLE Share link to this page on Google+
http://www.linkedin.com/shareA...New window External Subdomain
A-TITLE Share link to this page on LinkedIn
http://pinterest.com/pin/creat...New window External
A-TITLE Share link to this page on Pinterest
https://www.xing-share.com/app...New window External Subdomain
A-TITLE Share link to this page on Xing
http://www.reddit.com/submit?u...New window External Subdomain
A-TITLE Share link to this page on reddit
http://www.tumblr.com/share/li...New window External Subdomain
A-TITLE Share link to this page on Tumblr
http://www.stumbleupon.com/sub...New window External Subdomain
A-TITLE Share link to this page on StumbleUpon

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.ctan.org/"
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 0.04 seconds.
This page only loads 3 CSS files. That's ok.
This page only loads 3 JavaScript files. That's good!
The file size of the HTML document is fine (19 kB).

HTTP Response Header

NameValue
dateSat, 31 May 2025 08:50:11 GMT
serverApache
cache-controlno-cache, no-store
expiresFri, 30 May 2025 08:50:11 GMT
pragmano-cache
set-cookie69 Characters
content-typetext/html;charset=utf-8
content-languageen
varyAccept-Encoding
content-encodinggzip
x-forwarded-protohttps
x-forwarded-hostwww.ctan.org
transfer-encodingchunked
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 8,417 referring domains.
This page has 153,591 backlinks.
This page has backlinks from 5,941 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *
Disallow: /json/
Disallow: /mailman3/
Disallow: /xml/
Disallow: /admin/
Disallow: /error/
Disallow: /mirrors/mirmon/
Disallow: /ctan-portal/

Similar sites

Search preview

Most important keywords

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

KeywordResultRecheck
TeX68%Check
TeX Archive66%Check
Comprehensive TeX Archive65%Check
TeX Archive Network65%Check
Comprehensive TeX Archive Network64%Check
CTAN62%Check
Archive62%Check
Comprehensive62%Check
Network62%Check
CTAN update47%Check
Show more keywords and terms

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